Clock-spring wires which one goes to the horn relay?

Correction: the 8 wires do include the 2 airbag wires, but I know which ones those are.
I'm attaching a picture of the factory clock spring.

You are correct, it is the black wire which must be grounded. Here is a wiring diagram so you can see how the system works. Check out the images (below). Let us know if you need anything else.

I should have read the diagram more carefully. The clock-spring has nothing to do with the horn. It's the turn signal switch that has the wire. There are three clusters/plugs of wires that go into the turn switch. The correct wire is the black wire in the middle cluster (it's positioned just to the right of the leftmost cluster and connects four wires to the switch).
Thanks for the diagram!

Good to hear, please use 2CarPros anytime we are here to help.