It looks like the tank would work if you faced the openings
toward the rear of the trailer. Of course you have to extend
the fill hose and the hose to your pump.
You could also face the tank openings toward the front
of the trailer and run the drain tubing next to the tank to
the existing hole.
Another option is to put some wood (plywood 3/4" ?)
underneath the tank to raise it enough to run a drain hose
under the tank to the existing drain hole.
When you finish it would be great if you would post some pictures
of the completed installation. I re-secured the tank in my rig
and noticed thar there is plenty of room to change the routing of
BTW PPLMotorhomes has a better price.