At the back of the tank there are four protruding fittings. One is the -10 AN stainless feed line fitting and the other is the -8 return line. The other two are the power outlets, one for the 10GA teflon-coated wire to supply power to the pump. The pump needs to be tapped into an ignition wire; that way it is activated the minute the battery is hot. The last fitting is for the ground wire.