[mickmate]

I've got pictures of the assembly on a car I'll find for you. There are two tabs with holes in them welded to the frame it looks like you're missing. A 1/4" screw goes through the two tabs with the sleeved tube end of your hinge between them. The other end has two of the plates you picture. One is welded to the frame of the panel the other is welded to the end of the bent tube. They bolt together there so you can align the panel or shim the height.