Electrical connector behind Fuse panel

I have just finished reinstalling the dash in my 98 Ford Expedition XLT 4.6L after replacing the heater core and blend door. I have all the electrical connections plugged back in except for 1 that I can't find the corresponding plug to. It is trapezoid shaped, black, has 6 cavities, 3 terminals in an 90 degree pattern, 3 wires or/bl or/gr bl, the wires are about 8 inches long and coming out of the back of the fuse panel. This is not the Data Link Connector. When I turn the key I get nothing but what sounds like a relay clicking. Where does this connector connect to? Please help and try to guide me to it. Thank you