I have a 2005 Chevy Cobalt LS, completely stock radio, I don't have the Pioneer System, I don't have On-Star. I have a 12 Inch Rockford Fosgate P3 Subwoofer, Sony Xplode Amplifier, and an 8 Gauge wiring Kit. I need to connect a Hi-Lo converter to the rear speakers, and need to connect the remote wire to the back of my stock radio. I have this wiring diagram below, and I'm wondering if I can connect a wire to the "Car Stereo Amp Trigger Wire: Pink" and wire it back to the Sony Xplode amp as my remote wire. Can this be done? Also, how do I connect the hi-lo converter to the rear speakers? Do I have to connect it to one, to both, to the tinsel, I'm really lost?