Hi waynec,
I have been looking for the same information for some time, here is a link to Missing-Lynx that might be helpful:
www.network54.com/.../T-34+fuel+tank+questions...
To cut it short, I have never seen any fuel lines to the side-mounted drums. I think you will find that the lines that go to the rear drums is the electric cabling for the smoke dispensers.
Svenne