Buettner,
On using the plug, keep in mind that Honda wired the plug to turn off the light bar when the headlight was on high beam. It only works on low beam, for reasons of their own.
So, using the plug as is will shut off your added device when on high beam. There is a fix, cutting the blue wire to the plug. See the tech section,
http://tech.vtxoa.com, for the complete writeup.
As a suggestion, since you'll be into the headlight assembly anyway, solder up and install the turn signal beeper and cutoff as described in that tech section. Easy, and they work great. The green wire to the plug is the ground wire, by the way.
Good luck.