Curios API

My problem is related to the Curios API plugin, the problem is that when I created a thing, specifically a belt and a model to it, when the character crouches instead of the belt acting like a body, his model only goes down a little but remains in front of the player when the character is standing on the place everything is fine, while I created another object when it is wearing a belt, it behaves in proportion to the body and does not stick out ahead of the player.