My 68 sport satellite had plastic clips installed in the body the molding would snap over. They would have a center that was plastic also that after the clip was slid into the body hole, you would push the center in so it would expand in the hold to stay in place.

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram