I cut a six inch hole in the side where the hose goes down -- right above the 90 degree where the hose goes underneath the deck. That way I had someone feed the hose down from the filler and stuck my hand in the hole to help guide the hose under the deck toward the tank. I installed a circular inspection hatch over the hole when I was done.
http://i840.photobucket.com/albums/z...tre/ooo037.jpg