Unkown parts

[Ledsel]

The first bracket is the radio bracket goes right behind the driver in the rear compartment It's welded to the fender along the armour on the right and on the left is a seat that folds down and it has the same bolt pattern on a piece of angle iron bolted to it. The second pictures of the angle bracket with the small hole is the same ones that I'm trying to find out about. They are on each side of the drivers and gunners seats at he bottom. then there is a double hole one in the middle higher up Part no.CTL14303(drivers side.)