Installing an aftermarket electric liftgate on a 2014 CX5. Unlike others I have installed this kit does not connect through the OBD connector but rather taps in the wiring harness lock/unlock signal wire at the drivers side B pillar. My question is, how do I identify the correct wire? What is it's color code? Can I use my meter to see what wire is getting 12 volts when the lock/unlock button is pushed? Any thoughts?