I have a '92 Fender Precision Plus. This bass has two Fender Lace Sensor pups - a P and a J. I just received a Fender '62P reissue pup. Lace Sensor P has 3 leads coming out of each pup. Precision Plus has a 3-position Toggle Switch (J, J+P, P), Volume and Tone pot. It also has a push-switch that was described to me as In/Out of Phase. How do I wire the replacement pup which only has 2 leads coming out of the pups??