I ran into a problem replacing the bumper skin on my convertible. I followed the video instructions successfully until literally the last step. See photos - The outer two of four access rear points did not have 10mm nuts as described in videos. Instead, it appears to be attached with a bolt from the other side of the skin.

Does anybody know how to remove these attachment points? or have some perspective as to why these attachment points do not correspond to the available directions?

Thanks!

Audi Rear Bumper Skin Jpeg.jpg