@Baal - Awesome, thanks for the link! That was very helpful.
@anrkizm95: Thanks! The red ones I found were actually 22-18 AWG, .250 tab connectors:
http://www.amazon.com/JT-Products-2103H-Insulated-Disconnect/dp/accessories/B002UZW9C0
I found those exact ones at Fry's Electronics for $1.99. They worked perfectly - I just:
- cut off the white connector on the 2010 LED tail light (I couldn't figure out how to easily pull out the wire ends),
- stripped the wires with an automatic stripper,
- crimped one of these tab connectors to each wire end,
- wrapped a little electrical tape around where the red sleeve surrounded each wire (for a little extra water protection), and
- installed the tail light on the bike.
The 2010 LED tail light's wire colors match those on the 2009 CR's harness exactly - black, orange/yellow, and orange/white, so I just matched them up. These tabs fit so well that they actually clicked into place when I inserted them in the stock connector.