When removing some of my car ceiling grabs, this design can be used to plug up the hole in the ceiling fabric.

While I specified the hole to be 5mm in diameter, this was not the case in the printed version, and required some minor drilling.

Also, be careful when turning the screw, the cover will try to move with the screw, and break the little plug next to the screw hole. When iterating on this design, that plug should be more sturdy.