animatedHeadHeightBlend bodyPosStiffness bodyRotStiffness chestClampWeight chestGoal chestGoalWeight chestPositionOffset chestRotationOffset goalPositionChest headClampWeight headPositionOffset headRotationOffset headTarget IKPositionHead IKPositionPelvis IKRotationHead IKRotationPelvis maintainPelvisPosition maxRootAngle minHeadHeight moveBodyBackWhenCrouching neckStiffness pelvisPositionOffset pelvisPositionWeight pelvisRotationOffset pelvisRotationWeight pelvisTarget positionWeight rootHeadingOffset rotateChestByHands rotationWeight useAnimatedHeadHeightRange useAnimatedHeadHeightWeight

Transform headTarget The head target. This should not be the camera Transform itself, but a child GameObject parented to it so you could adjust its position/rotation to match the orientation of the head bone. The best practice for setup would be to move the camera to the avatar's eyes, duplicate the avatar's head bone and parent it to the camera. Then assign the duplicate to this slot.