onemanband

this is the plug that attached on the factory radio, i tried to connect a aftermarket android headunit with metra 70-8113 harness on my car, the screen lit up but no sound from the speaker,then i noticed two of the pins from 8113 were plug in to empty spots and two wires from here were not connected. i just want to know what all these wire are for so i can do some modification to that POS harness that claimed to fit on my car.thank you guys.