I started wiring the Russ Thompson turn signal last weekend, and everything went pretty smooth although I do have a few questions on one thing.
I used the schematic shown below, and on the on the 4 count terminal connector next to the "blue" connector from the RF harness it shows a black wire that says: "To headlight switch feed 2"



Questions:

1. Is this supposed to be an existing wire or a new wire I need to make?
2. What gauge wire should I used if it is a new wire?
3. I used 18gauge wire for all the other connections and loops is that sufficient?

Thanks for the help,

John