I disassembled a 63 Falcon 15 years ago. Now I'm putting it back together. The bottom of the fender has a bracket where it meets the rocker panel. A bolt goes through the bracket and attaches to the rocker panel. On the rocker panel is a rectangular hole about 1/2"x 3/4". Inside this rectangular hole is supposed to be some type of nut. Trying to figure out what will fit there. It's not designed for a fold over nut. I'm thinking cage nut. I just order some. Anyone with a Falcon know for sure what's used for the nut inside the rectangle?