Most every hole is accessible from behind the panel, so I'm going to use the butterfly clips that nut on from behind! Of course my interior is out for a floorpan change so I can just zip em in at this point!
Thanks. Can you let me know what you use when you get to that point please. Where did you find the floor pans. Mine are in great shape for exception of a small hole in the front that can be fixed with a weld in patch.