I recently added one to my 22, and after having seen several how-to posts here and on YouTube, my only recommendation is to place close to where you would generally cook your food, relative to the lid, so you know what the temp is where your food cooks. This is especially useful when cooking indirect or smoking. In my case, I wanted the thermometer on the same side as the top vent but as close to the grate as possible. Good luck and welcome from Highland Park, IL (north of Chicago)!