Thanks for the reply, I'll get the pics and post them later today. You are absolutely correct, the point where I connected the aux fuel line going to the designated aux fuel pump has a long tube down into the tank. The other hose I mentioned is 3/4" ID, very large, doesn't look like a line to go to the aux fuel pump unless I neck it down with adapters.
Regarding the trailer, I haven't seen one like it here on the forum, it looks more like a covered wagon, huge wheels, massive hitch, independent brakes on each of the two wheels, two giant steel wheels on the hitch jack, air brake connections, etc. The cover is some sort of rubberized canvas, the whole thing is desert tan. Again, the pictures should explain a lot. I'll also get pictures of the nameplate (s), etc.