Does any one know the correct method of attaching the noted bracket to the floor on the left hand side of the trunk There are weld nuts in the car that has a pattern very close to a repro bracket available in the market, but not sure if this is correct and what type of fastener was used to attach it to the body. The weld inserts are a 12-32 thread. I have also read that this bracket was welded to the floor. Any help or photos would be greatly appreciated