I purchased a Rickenbacker 325 guitar kit build. I am unsure how to wire it. I have three humbuckers, two tone pots and 2 volume pots and a three way selector switch where down is bridge, up is neck and middle, and center is all three pickups. I think the bridge pickup connects to one tone pot, and the middle and neck pickups get fused together and connect into the other tone pot. I need someone to confirm this, since it seems strange to connect two pickups to one pot. Please advise if you know. Thanks.