Correct: The parking brake bracket bolts to the floor and the driver's side inner fender bolts to the bracket. I was misunderstanding the question when I suggested the filler strips.
If you don't have one, they're available aftermarket from the usual vendors.
LinkHere's a pic from below. You can see one bolt on the inner fender, and what's left of the cab floor. It's heavier than the cab floor, so didn't melt completely away.
