There are two small torx adjustment screws hidden back just inside between the headlight and the trim ring. The top screw adjusts the aim up-down, the side screw adjusts the left-right aim. You will need a skinny torx-style screwdriver to fit the torx adjusting screws, a standard torx driver that fits a 1/4" or 3/8" drive is too fat to fit those particular screws. Some suggest removing the trim ring first which is held in by three screws but with a skinny-enough torx-head screwdriver, there is no need to remove the trim ring. Don't mistake the three screws that only serve to hold the headlight in place with the two adjustment screws that are quite different looking.