2008 XB with pioneer pt546-00081. im adding an amp, and im color blind. i want the amp to turn on with the radio and don't want to add a switch,, some say the grey some say the blue some say blue with a stripe.. So what color on which plug and which pin. do i connect my wire to the existing wire from the car to the harness or discard and attach remote wire by it self to the harness plug.

 

it was the grey wire,

 

curious how this worked for you guys. I'm debating doing this, but am also considering a satellite subwoofer, I'm wondering what's involved with hooking one up, I didn't see any connector where the factory sub said it would be. I wonder if those work with this stereo