Can anyone provide me with direction? I am rebuilding my Mavic 2 Pro Gimbal assembly and am unable to attach the camera module to the yaw arm. The original yaw arm cracked at the ring, releasing the camera. I ordered a used yaw arm. The replacement yaw arm I received has a "button" in the ring which I suspect was part of the camera and was just left on since it is hard to remove. Please see the attached photo. The red arrow to the left is a stock image, the red arrow to the right is my replacement arm with a button in the ring. The blue arrow is the existing camera which needs to be inserted but cannot because the button is occupying the space. Am I correct in the situation? How best to remove the button (if that's the case) without damaging the ring? Thank you for your attention.