Ok. So in a fit of irritation I decided to pull the preamp and knobs out of my Yamaha RBX JM2 because the knobs are scrathy and the preamp hisses. I figured I like the sound of the pickup so I'll wire it direct to the jack until I decide on a preamp to buy and drop in. From what I understand the pickup is a Seymour Duncan custom MM 6 string pickup. The problem is I only see 3 wires plus the shield. I thought with a humbucker there should be 4 and I would need to just twist the 2 middle wires together and wire to a jack. See images.