Thank you for the pics they are extremly helpful. And the conecter on the fire wall i was talking about earlier, looks just like the larger grey conecter shown in the last picture. I do have that one hooked up. But the one I'm at a loss on is higher up on the fire wall, on the large diameter, section of wire harness, just below the top of the fire wall. Its next to a rubber hose, that goes down, and is open ended, which apears to be a drain, or over flow outlet, maybe for the heater.
And thanks for the help so far, its been extremly helpful.