need help with location of plug

[u.p.cowboy]

not sure if this is the right forum to place this in but here goes, 2000 7.3 3/4 ton, I have a eletrical plug in that I dont know where it goes, the wires going to it are yellow/red stripe and yellow/black stripe, the 2 wires split off from by the blower motor resistor plugin. I attached 2 pictures, any help is greatly appreciated, because Ive been looking for hours and am lost.