dogtags

I am looking for photos, drawing, and other bis of info about the canvas top for the M38. I am trying to install it on the museum's ( http://mvmwisconsin.com ) M38 and am running into a snag.

I have the top on and the doors are easy to figure out also, what is getting me though is that there seems to be some type of support that runs along the top needed from the windshield to the rear side curtains. The side curtain has a rod that goes into a pocket on the body behind/alongside the seat. From there is goes up to the top and connects where?

Thanks guys.