Thanks for the help guys. With all the extra info I was able to find this:
"Dackelgarage" Bundeswehr two-man-tent - One Sixth Warrior Forum
It's a 1/6 scale version of my poncho/shelter. SO you can see how two of them would make a complete tent.
Cool, now I need to make the poles and pegs. It will still work as a leanto shelter, since I only have one!