All you need is a SATA power spliter, a switch and a 360 dvd drive power cable.
This is for people who know what a ck3 is and don't want to spend the money on one.
Here are a bunch of pics that show you what it looks like and basically how to make it (really easy to figure out).
SATA power spliter
360 dvd drive power cable
If you have an extra dvd drive power cable you can cut it and make 2.
If you only have the one out of your 360 (DO NOT CUT YOUR CABLE) obviously.
You can connect to the adapter with LED legs. They fit perfectly into the holes on the power adapter. The probe wire just connects to any of the ground wires.
You can get all of this at Home Depot and or RadioShack.