Or, like I've mentioned before, get their motorcycle kit, which comes with all of the wiring you need and a compact relay box.
Hrm, I purchased the dual 55W motorcycle lighting kit about a month ago and did not receive any compact relay box. All that came were two igniters, two ballasts, and two bulbs, plus a few other necessities (mount systems, weather proofing materials). Certainly no relay. The kits on their websites make no mention of a relay, unless I missed some sub-section of the website.
Oh well, no matter, very easy to run down to radioshack and pick one up for about 3 bucks.
I haven't delved into the headlight wiring of my Honda yet, so I'm not sure how helpful this will be. Also, please forgive the watermark of a Buell forum on the bottom, I'll remove the image if it's against the rules (don't mean to step on toes at all). Here's how the DPDT relay was wired (with "to lights" on the right side of the image actually leading to switch power for the relays, for the high and low beam). Orange is parking lights (disregard), white is high beam, yellow is low beam, and black is ground. It'd be easy enough to pick up a SPST button and mount it somewhere on the bike to turn the low beam on, such that when it is pressed it connects low beam wiring providing switch power to both the DPDT relay and the auto relay. This would also allow you to avoid burning up your ballast with light flicker (if that's an issue on a CB, I know it is on my Buell) when you turn the bike on.
Again, sorry if this info is less than applicable. I JUST got into the world of Honda's (about 4 days ago to be exact), so I'm not sure how the electrical systems work just yet.