That isn’t withered bonnie, it’s the wrong arm first of all if you look closely the endo is facing away from the camera , and the thing that says W Bonnie looks like the platform the endo is on, which means the thing that says WBonnie is meant for a different endo. Also if you want to use the missing arm logic, well the endo is also missing his hand, also the missing arm is clearly not done as you can see unconnected wires