We lost the rear part of the belly pan on our initial trip home with Little Girl somewhere in the rain in a construction zone (?). I was driving so that makes it my fault.

We never noticed how it was put together before we started home, and are now at a loss as to how it's supposed to go together:
does the rear belly pan wrap around on the outside of the rear storage compartment or does the storage compartment get made with a belly pan piece on the inside of the runners/skid plates that make up the sides of the compartment? Or do we do both?
Does anyone have a pic of an early 70's storage compartment on the inside and/or underside to help us?
Thanks!
Kay