diff --git a/data/uking_functions.csv b/data/uking_functions.csv
index 22e7244d..6005e7d9 100644
--- a/data/uking_functions.csv
+++ b/data/uking_functions.csv
@@ -82986,7 +82986,7 @@ Address,Quality,Size,Name
 0x0000007100f8dcfc,O,001044,_ZN4ksys4phys9RigidBody19replaceMotionObjectEv
 0x0000007100f8e110,O,000748,_ZN4ksys4phys9RigidBody4x_10Ev
 0x0000007100f8e3fc,U,000816,phys::RigidBody::x_11
-0x0000007100f8e72c,U,000136,phys::RigidBody::x_12
+0x0000007100f8e72c,O,000136,_ZN4ksys4phys9RigidBody16setCollisionInfoEPNS0_13CollisionInfoE
 0x0000007100f8e7b4,O,000052,_ZN4ksys4phys9RigidBody19setContactPointInfoEPNS0_16ContactPointInfoE
 0x0000007100f8e7e8,O,000264,_ZN4ksys4phys9RigidBody26setFixedAndPreserveImpulseEbb
 0x0000007100f8e8f0,O,000460,_ZN4ksys4phys9RigidBody6freezeEbbb
diff --git a/src/KingSystem/Physics/RigidBody/physRigidBody.cpp b/src/KingSystem/Physics/RigidBody/physRigidBody.cpp
index 9ec4ffe2..71746819 100644
--- a/src/KingSystem/Physics/RigidBody/physRigidBody.cpp
+++ b/src/KingSystem/Physics/RigidBody/physRigidBody.cpp
@@ -16,6 +16,7 @@
 #include "KingSystem/Physics/RigidBody/physRigidBodyMotionSensor.h"
 #include "KingSystem/Physics/RigidBody/physRigidBodyParam.h"
 #include "KingSystem/Physics/RigidBody/physRigidBodyRequestMgr.h"
+#include "KingSystem/Physics/System/physCollisionInfo.h"
 #include "KingSystem/Physics/System/physEntityGroupFilter.h"
 #include "KingSystem/Physics/System/physGroupFilter.h"
 #include "KingSystem/Physics/System/physSensorGroupFilter.h"
@@ -473,6 +474,17 @@ void RigidBody::x_10() {
     x_8(nullptr);
 }
 
+void RigidBody::setCollisionInfo(CollisionInfo* info) {
+    if (mCollisionInfo != info) {
+        if (mCollisionInfo && isFlag8Set())
+            System::instance()->registerRigidBodyForContactSystem(this);
+        mCollisionInfo = info;
+    }
+
+    if (isFlag8Set() && mCollisionInfo && !mCollisionInfo->isLinked())
+        System::instance()->registerCollisionInfo(mCollisionInfo);
+}
+
 void RigidBody::setContactPointInfo(ContactPointInfo* info) {
     mContactPointInfo = info;
     if (isFlag8Set() && mContactPointInfo && !mContactPointInfo->isLinked())
diff --git a/src/KingSystem/Physics/RigidBody/physRigidBody.h b/src/KingSystem/Physics/RigidBody/physRigidBody.h
index 5cd3cd40..3f219a4e 100644
--- a/src/KingSystem/Physics/RigidBody/physRigidBody.h
+++ b/src/KingSystem/Physics/RigidBody/physRigidBody.h
@@ -24,11 +24,12 @@ class hkpMotion;
 
 namespace ksys::phys {
 
+class CollisionInfo;
+class ContactPointInfo;
 class MotionAccessor;
 struct RigidBodyInstanceParam;
 class RigidBodyMotionEntity;
 class RigidBodyMotionSensor;
-class ContactPointInfo;
 class SystemGroupHandler;
 class UserTag;
 
@@ -187,10 +188,9 @@ public:
     // 0x0000007100f8e3fc
     void x_11();
 
-    // TODO: rename
-    void* get90() const { return _90; }
-    // 0x0000007100f8e72c
-    void x_12_setField90(void* field_90);
+    CollisionInfo* getCollisionInfo() const { return mCollisionInfo; }
+    void setCollisionInfo(CollisionInfo* info);
+
     ContactPointInfo* getContactPointInfo() const { return mContactPointInfo; }
     void setContactPointInfo(ContactPointInfo* info);
 
@@ -584,7 +584,7 @@ protected:
     hkpRigidBody* mHkBody;
     UserTag* mUserTag = nullptr;
     ContactPointInfo* mContactPointInfo = nullptr;
-    void* _90 = nullptr;
+    CollisionInfo* mCollisionInfo = nullptr;
     u16 _98 = 0;
     RigidBodyAccessor mRigidBodyAccessor;
     f32 mScale = 1.0f;
diff --git a/src/KingSystem/Physics/System/physCollisionInfo.h b/src/KingSystem/Physics/System/physCollisionInfo.h
index 81b28576..7a96a2fe 100644
--- a/src/KingSystem/Physics/System/physCollisionInfo.h
+++ b/src/KingSystem/Physics/System/physCollisionInfo.h
@@ -36,6 +36,7 @@ public:
     explicit CollisionInfo(const sead::SafeString& name);
     ~CollisionInfo() override;
 
+    bool isLinked() const { return mListNode.isLinked(); }
     static constexpr size_t getListNodeOffset() { return offsetof(CollisionInfo, mListNode); }
 
 private:
diff --git a/src/KingSystem/Physics/System/physContactListener.cpp b/src/KingSystem/Physics/System/physContactListener.cpp
index 4a2a72aa..7fbd3c56 100644
--- a/src/KingSystem/Physics/System/physContactListener.cpp
+++ b/src/KingSystem/Physics/System/physContactListener.cpp
@@ -98,10 +98,10 @@ void ContactListener::handleCollisionRemoved(const hkpCollisionEvent& event, Rig
     const auto layer_a = body_a->getContactLayer();
     const auto layer_b = body_b->getContactLayer();
 
-    if (auto* unk = body_a->get90())
+    if (auto* unk = body_a->getCollisionInfo())
         mMgr->x_19(unk, body_a, body_b);
 
-    if (auto* unk = body_b->get90())
+    if (auto* unk = body_b->getCollisionInfo())
         mMgr->x_19(unk, body_b, body_a);
 
     const auto i = int(layer_a - mLayerBase);
diff --git a/src/KingSystem/Physics/System/physSystem.h b/src/KingSystem/Physics/System/physSystem.h
index 3e08d3e1..12339455 100644
--- a/src/KingSystem/Physics/System/physSystem.h
+++ b/src/KingSystem/Physics/System/physSystem.h
@@ -53,6 +53,9 @@ public:
     void freeContactPointInfoEx(ContactPointInfoEx* info) const;
 
     void registerContactPointInfo(ContactPointInfo* info) const;
+    // 0x000000710121696c
+    void registerCollisionInfo(CollisionInfo* info) const;
+    // 0x0000007101216974
     void registerContactPointLayerPair(ContactPointInfoEx* info, ContactLayer layer1,
                                        ContactLayer layer2, bool enabled);