Here's a photo of the t-adapter. I had Aquasafe include it in my order for another $5 or so. It screws right into your cold water connection.

http://www.canreef.com/photopost/sho...o=5188&cat=507

BTW, I officially got wierd look #3214 since I started this hobby from my wife as I was stooped very awkwardly under the sink taking this picture. =)