So, the instructions seem pretty simple, but I’ve got some extra wires here. Each pickup has three small wires, plus a larger ground wire coming off of it. Directions only mention 2 pickup wires going to the balance pot. Is the third wire an extra ground? Looked like the were going to the same spot on the original pre-amp. Is the white wire hot/signal? Also this bass has a lot of ground wires in it. Each pickup, bridge, and cavity wall. Should I try to get these all to the volume pot like the instructions say to do with the bridge ground?