Can any one please help me to find out whats this white plug with 4 pins is for (Picture attached) near the OBD 2 connector. I have standard Audio in my model X and I installed a Tesla sub woofer in my rear Passenger side corner. For the Sub woofer It has already a plug to connect in that sub woofer place. My next finding is whats this plug is for ? Is this connector is for Sub woofer connection ? or for sub woofer do I need to run a new wire from my new Amplifier or where can I find the connection for the sub woofer.