73 duster horn relay ?

I'm trying to figure out what goes where on my relay as I had nothing on my Sport. It seems like someone may have done some mods to your relay. There should be a green with red tracer that goes out to the horns, a couple of black wires, one to the horn switch and (I believe) the other is for the buzzer, and there should be a hot coming from the fuse block (my diagram shows this as violet). Good luck.