'70 Cuda headlight bezels: They attach with 2 screws to the grille, and 2 screws to the fender. For the fender screws, do they thread right into the fender, or is there a plastic clip/insert into which the screws are threaded? One of my fenders has square cutouts, about 1/4" square, for most likely some sort of clip. The other fender has holes - the screws threaded right into the holes. The fenders were replaced sometime in the late '70's; they are not original to the car. Where can I get the correct mounting hardware? Which method is correct? Thanks!