CCPU interiors were quite spartan. I believe the door panels were just upholstery board, no upholstery material on the hardboard. There is supposed to be windlace on both side and the bottom. The door upholstery board panel was held in place with ringshank nails driven into small metal clips that snap into the holes in the inner door skin. The picture below show the round clip that snaps in the door holes and a ringshank nails used to secure the panel to the door. Neil Wilson has a nice website that shows a lot about AA trucks and pickup stuff. I believe I have the website address, but I would have to search to find it.
Rusty Nelson
I found his website addresses:
http://aafords.com/cabs/82-a-closed-...ed-cab-details
http://aafords.com/cabs/82-a-closed-...stery-windlace