Here you can see the aluminum plate that has been cut and bent to fit in there to tie the sides of the box to the frame of the dump box. At this point it's work from the inside out on the repair. The pylons wer warped sideways I had to pull the one on the right towards the center of the truck an inch and a half and the one on the left had to be pushed out over 2 and 1/2 in to get them Square with the deck or floor