The control board and tap fittings, fitted to the Tank. Note there is a tap straight from the tank and then another one after the tee with hose fitting to drain tank or fill 25 litre drums if needed Next I wired to the battery and wired in the self switching relay for battery charging. instructions are in the kits on how to wire. Then box the battery in for protection if you feel it could get knocked. Next I connected Hose from the pump to the reel. I found it a good idea to have quite enough hose so I could move the reel from the van to where Ineeded outside the van.