REinstalling water pump system-help

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I recently bought an '04 3670, and the PO was a traveler who mainly stayed in rv parks. When I got the 5th wheel home I remembered noticing a shurflo pump in the front compartment, so I hit the pump switch to check the existing pump, but it was silent. That's when I discovered that when the pump went out, the PO had a mechanic bypass (and remove) the pump and plumb straight to the cold water line. They also took out the outside shower plumbing, and dropped the fresh water tank fill down in the basement. (I could not figure out where the clean water was coming from when I stopped to check the tire pressures bringing it home). Anyway, we've bought this to set up on 40 acres we're going to build our house on next spring, to use as a break trailer/crash pad while we're at the property, so until we get the well drilled, we'll be needing the pump. Can anyone direct me to a diagram of the fresh water system on the '04's?? Thanks, Lee Butcher