Before you go any further
That's the position and screenshot from the clip on removing tank
It does look awkward - and chances are the pigtail leads to the outside - not the middle - of the truck.
Before you go further, are you absolutely certain there is no fuel whatsoever at the test port?
If your pump is 'stuck', might it be possible to shift it by pressuring (carefully!) through its delivery line? (I'm assuming a vane type pump). If that worked, then it might identify the pump as culprit and save a lot of time chasing wiring which is OK. And save the amount of time you have fuel stored in jerricans while waiting for a new pump to arrive.
If you were closer, I'd happily come over and let you syphon your full tank into my 'Burb's tank. Really, I'd not mind at all.