I am replacing the stock linear series model Ls4000b stereo unit with a jensen jwm6a model. I messed up the wiring at some point. The new unit powers on. No sound. Get a little clipping from the center speakers. The jensen unit has wires for a,b,c speakers. The wires I'm connecting the unit to only have a,b speakers. So I didn't connect the C speaker wires,just capped them with a wire nut. Couldn't find much info on how to go about connecting the jensen unit wires to the old wires in the rig. Thanks for help