Unfortunately I don't have any pics but I can text you some tomorrow just need a number. All I did was have c channel welded into a L bracket and bolted that to the frame and set the box on top of that and bolted down through the box, that way the boxes don't go up with the body and everything stays organized. Also make sure to use bigger flat washers on the inside of the box so the box doesn't tear.
We got some put on our 08 F350 dump and they are just massive L brackets. Got the buyers ones instead of the weather guards, A lot cheaper! We where gonna do it ourselves but it turned out to be a huge pain in the A$$! SO we took it to out truck outfitter and they did it! Worth the money not to mess with it!