Install Onan in 5th Wheel Questions

I bought a Onan 7000 Marquis. It came out of an A. The dealer installed so I can't tell you everything. It is not on a slide, but I can get to most everything. It uses the 5ths batteries. Dealer built a wooden insulated box in the front compartment. It's designed to hold 2 6 gallon marine tanks, My exhaust goes through the floor. It gets air through front door. RV was generator ready and can be started from inside the trailer. very hard to hear the unit running from the inside. Very well insulated. It will run anything in the trailer. I only have it as a back up as we always park with full hook ups. Generator had about 400 hours when I purchased it. I really like the set up.