Hi I'm new here and i really need your help. I have a 2001 ford expedition xlt it has a aftermarket hitch but what looks like a factory installed 4 wire trailer plug. i know what i need to get to convert it toy a 7 pin connector but i can't find the brake controller plug under the dash. i see pics of the plug by the obd2 port and i have nothing there and i see some pics with it on the side of the radio and i have nothing there. I will like to know if anyone here can help me please. in going on a trip next month and will like to get this resolved soon. thank you to any one that can help me. God bless!!!