NEED HELP FAST! What is this on the wiring schematic? Wiring the car now

GEEZ, I made a horrid mistake, here. That item IS NOT only the key in buzzer, it's also your horn relay. The buzzer part of the equation is the end terminal, and is why it's broken off in the photo---to disable the buzzer and still allow the horn to operate

I've had about 5 hours sleep in the past 48 hours.

Your right. Even on his schematic it says Horn Regulator Buzzer but the magic marker covered it up some and I didn't see that right away.
The buzzer I have in the picture of is my old and probably the original one out of my orange demon. I replaced it with another one but still unplug it from time to time just to stop the buzzing.