Hi i have a 1980 P-bass special USA. After a long search i finally found a replacement active board for it. The problem is i have 3 wires 2 black ones and one white on. One of the black ones comes from the bridge the earth and the other 2 come from the pickups. What i,m trying to find out is where these wires are soldered to the active board. I don,t want to wire them to the wrong place and fry the board. Does anyone know where they go on the board. I can provide photo,s if this helps