there isn't any holes on the rear when removing the badge only on the front bumper.
The front has no holes just the beefburger recess in the bumper, on the coupe the back has 2 holes (the roadster doesn't so you can go naked on the back).
If you look at the badges you took off one will have locating pins and one won't (back and front respectively).
If you have a coupe thats different to this then your very lucky and the only one I know and I'm jealous as I'd prefer to debadge the rear! .
Dave