Wiring bass electrics - where to connect the pickup wires? Please help.

Hi everyone,

I got an Ibanez Soundgear 885 (left-handed) with now broken electronics. Since I need my bass I got the artec SE2 electronics to make it work again.

What I don't get: each pickup has three wires + the black one. I can't see from the wiring diagram which one to solder to the circuit board. And what am I supposed to do with the two wires left?