mystery plug. please help

upon taking apart my center console today, i discovered a plug that is not plugged into anything in the tunnel below the heater controls. it is a black plug with 3 wires coming out of it. the wires are light tan (or maybe an off yellow?), light green, and dark green. the plug has many different terminals for wires, but no other ones are used. the car is a 97 GTP. if anyone has any idea, i would appreciate your help. i can post a pic, if neccissary. thanks!