[cletrac (RIP)]

Here's a few detail pix of attachment stuff.
The first is the fasteners that go along the front of the box and in the second you can see the seven of them down about 3 or 4 inches from the top. They point back and the front canvas attaches inside the box. The battery switching panel attaches below this level and is spaced to the rear so it stays inside the canvas top.The sides and rear attach outside the box. The sides attach to the tilt frame with 8 of the same type fasteners per side as are used on the sides of the windshield frame. These are the ones that Mile says have a thin strip of metal in a loop in the canvas to keep it tight to the box.
The third pic shows the loop beside the endgate that the strap on the canvas ties to. The rusty patch that didn't get sandblasted shows where the sign holder was mounted.
The wireless trucks had the folding legs on the bottom of the tilt assembly so you could remove it and use it as a tent like in the last pic. The personnel variants didn't have this feature. There's more details on my C8 data plate thread. That removable tilt feature is unique to the 8 cwt trucks.