I have a 2014 Rallye edition that had the factory radio still. I’m the second owner and bought a touch screen radio to upgrade. Apparently the first owner changed the radio and then put the factory back in before getting rid of the car. The factory wire harness is no longer there. I can’t figure out what wire to connect the yellow constant to the factory wires. None of them are yellow. Any ideas or diagrams? Can’t wait to get this radio going, need my apple car play!