This is an old thread -- I'm searching for info on this hole behind my couple's rear license plate (2005). Mine was covered by a round piece of tape that looked like fancy duct tape.

I'm installing a back-up camera this morning and want to run the camera's wire through this hole. Underneath is a Torx -headed screw. Looking at the screw from the inside of the car (through the grille), it appears to attach to the metal frame. My guess is that this was a late-add to help address making the hatch latch more rigid, and the screw shouldn't be removed.

Any (serious) info from others on this? It would be great if the screw were there only to provide a way in/out for wires.