I have an older kit July of 05 to be exact I bought used, the pump has 3 wires coming out of it, 1 small black..1 larger black and 1 red wire...I believe the larger black and the red wire go to the junction box labeled positive and negative but where does the smaller black wire go?? Julio was nice enough to email me instructions and schematic but its still unclear to me about this particular connection, perhaps I'm missing something...thanks for any help..Bud Smith