The PO might have had a leak and decided to bypass the original side fill position.
I would assume that it is laid out like my CCP. A picture would be of great help
That being said, there should be a pie plate right under the original filler cap. This only allows access to remove or hook up the hose. The hose should run down the starboard side gunnell and under the deck into the coffin where the tank is. If it is like mine, in order to remove the hose, you will have to cut a small section of the deck to gain access. The hose is most likely packed in that foam :cry:
Even if you could pull the old hose out through the coffin, there would be no way to run a new hose under that deck with the foam as well as making the turn upward.