Finally getting around to installing my front speakers, head unit and amp this week. What is the best way to connect the existing rear speakers using the factory wiring? I'd rather not cut the harness (but I will if need be), nor do I want to run new wiring. I'm using the MEX M70BT and a Scosche HDSWC1 if it makes a difference.

 

connect the rear speaker wires of the Sony to the rear speaker wires of the Scosche and that will plug into your main harness.

 

The Scosche doesn't have rear speaker leads, only front.

 

I remember seeing a set of white wires and gray wires, I'm guessing those are L/R and not front and rear? If that's the case the only two options I can think is adding the pin in the scosche harness or cutting in your main speaker wires off the HD harness.

 

Yes sir, the white and grey are left and right, which I'll not be using since I'm running the amp. Maybe I'll see if I can move the pins of the fronts in the Scosche to work for the rears. Thanks Alex