The tank should be relatively easy, there should be a fill line (larger diameter), a vent line (also a larger diameter) and a smaller line thsat hooks up to the suction side of the water pump ( it should show direction of flow on the pump). The other side of the pump hooks up to the units water system. Shoud be 2 wires to the pump, red is hot, usually goes to a switch located by the control panel, and the black is chassis ground. there is usually a drain somewhere in the bottom that goes through the floor, to drain the tank when needed.
03 Silverado cclb 3500 drw, D/A, Reese 22k hitch
07 Alfa SeeYa Gold 30RL,2 slides,power everything