Bob,
If you are going to modulate only the spoiler, like I did, and you are installing the flasher unit between the inner and outer trunk lid there are only two wires. Just test with a meter or probe to see which one is the hot side. I never trust wire color diagrams from one bike to the next anyway so this is the best way to be sure you are cutting the right one. The easy way is to cut them both and put in connectors to make your own "plug and play". That way you can remove the unit if you ever want to, and, test for the hot side while you have them disconnected.