I got pictures.
This is where the neck attaches to the back cap
This is where the filler neck attaches to the pipes off the tank. Should be able to redirect the attachment to the side with new hose.
This is looking up the inside of the back cap on the drivers side. White spot is where I took out a running light to get an idea of where the new filler might go. Won't replace the light, will need a new hole, no bigger than 4 inches.