The taller pickup ring is closest to the bridge, the short one is close to the neck. Install them sloping down toward the neck. Here's a link for humbucker pickup heights: http://www.gibson.com/News-Lifestyle/Features/en-us/pickup-height.aspx Or if you dont' want to read the whole thing here's the meat: "It’s best to experiment with different heights and see what works for you. Measuring between the top of the pickups and the bottom of the strings, with the strings depressed at the last fret, the best advice is to start with a gap of 1/16 inch between bridge pickup and strings and 3/32 inch between neck pickup and strings, and this makes a good general base from which to launch your own experiments." Good luck!