I have a Cort Action P/J, and it has 2 volume knobs and 1 tone knob. I don't know that much about pickups, but I'd like to know which knob controls which pickup, since I have 3 pickups, but 2 knobs. Is 1 knob for the J pickup and the other knob the P pickups blended? Also, is the knob closer to the bridge controlling the J pickup? Here's a photo of reference: Thanks!