Ok while looking around on the passenger side of my car like im going for the kick panel where the computer is located right directly across from that where the passengers left leg would be resting there is this small box. It is greyish lookin and has no words on it what so ever. It has a plug going in and out of it and then there is another plug up but it is open. It has a high and a low switch setting. What in the world is this box and what does it do???