It's the wood in between the metal half moon shaped tin that bolts to the floor and the box side, the metal arc that is in the picture I showed goes over the top of the wood.
1946 GMC 1 Ton 1984 GMC 1/2 Ton 1996 Dodge 1/2 Ton 2014 Chevy 1/2 Ton 2020 Ram 1 Ton Cummins
