If I remember correctly, there are two small grey clips in the top of the water reservoir pocket. I attached these to the small holes on the plastic top zipclip of the Badlands water reservoir. Hope this helps. I sold my 2200 a few years ago, so I’m recommending this off of memory.
No problems from my 2200. I still have a Badlands daypack with a 2L reservoir that I use for scouting or a daypack and have had no problems with the clips causing leaks. While the Badlands reservoirs are made by Hydrapack and are well made, I really like the Source reservoirs. They seem more durable and don’t retain any flavors or make the water taste like rubbery plastic.