I bought a new set of pickups for my CAR CIJ Jaguar. They are american vintage ones, the only thing is they dont have any wiring guide or packaging with them. The wire colors are yellow and black and grey and black. Ive got no idea which is the rythmm and which is the lead pickup. I used a seymour duncan wiring guide and wired the yellow and black wired pickup to the bridge position the guitar sounds alright how i wired it. Does anyone know if this is right and how i might check it.