hi all . i am making a pump box witha 7 Ah battery , that fits into this lovely little bucket with lid and carrying handle . inside is the flojet rlf ( this idea for the pump i got off Jeff brimble ten years ago ) this pump was used on a trolley system from Jeffs original design or simliar many a moon ago , now my question is does this flojet only have 2 wires coming out of it red and black ? and will just the live and earth suffice ? should i not have wire going to or from the pressure switch , is there a PS on this pump ?