What plugs here?

When I pluged a 7amp fuse into that what you see in the picture the blower motor for the heater and the dash lights came on..so I know something plugs into it that relays or operates that stuff..two of the wire that come out the back of it are Orange...I have to look and see what color the other two are..I think one is red..do you have this connection on your duster?....I started this voyage becasue my heater blower would not come on...and then I found this plug with nothing in it...I tested it and it was hot...so I put a fuses in this plug to direct connect it and sure enough the blower turned on as soon as I turned the key switch on but I could not get it to turn back off until I switched the car off.