Hey, I've been attempting to fix a 1986 Washburn B-10. It has 2 J pickups, a 3-way selection switch, and 3 knobs - a volume for each, and a master tone, which is also a push/pull to switch between active and passive. Two wires- a white and a yellow- are soldered to the preamp, but are loose. I believe they should be attached to the push/pull tone knob, but I am not sure of the configuration. Any insight would be greatly appreciated.