gzrglide-Thanks! I peeled the shrinkwrap back on the plug, matched the wires, and hooked it up.
Anyone else planning to do this mod- I used the fender fascia and running light from a 2010 SG on my '09 RG. I connected the tribar light to the bike with the 68828-10 wiring harness. Once you strip the shrinkwrap back about an inch from the 3-pin plug located behind the left-side cover, you will see three wires: black, red/yellow stripe, and blue. I cut the plug off leaving just the three wires. There are six wires on the 68828-10 wiring harness. I cut the black, red/yellow stripe, and black ones, and hardwired them into the corresponding wires I had hanging from the plug I previously cut.
The whole mod took me about two hours, I would probably still be in suspense if gzrglide hadn't saved me. Thanks gzrglide09!