Heresy. A Fender Jazz Bass 3 Way Switch Series / Parallel Wiring Harness and Control Plate.

Sold as a complete set. Wiring harness and plate are one unit.
Toggle Switch Color Options:  Black Tip, Black Tip & Body or Chrome tip

Knobs available in Classic Stacked Fender Knobs

Fully functional as a 3 way selector for you jazz bass with a bonus of a series switch in the middle. This plate lets you select quickly as to which pickup you want to be on. Comes with a stacked volume and tone pot complete with a .047uF  tone cap and a Kinman style treble bleed. Series mode functions when the 3 way toggle is in the middle position and the center switch is in the down position. If you select the bridge pickup with the toggle while in series mode, the signal is muted. The series selection is both pickups (in series) creating more output and different tone. Basically when you want your bass to act like one GIANT pickup. 

Pickup Connection. Neck hot to white pigtail on center switch. Neck ground to back of pot along with bridge ground wire.
Bridge hot to three way toggle. The available lug. Bridge ground to black pigtail on center switch.