An adjuster adjusts the position of a fog lamp, headlamp, or other form of adjustable, automotive lamp. The adjuster includes a side-opening retainer screw interface. The side-opening retainer allows the adjuster to provide clutching throughout travel. In addition, a distal end of the retainer includes a set of retainer snap fingers and a separate set of spring fingers. The snap fingers and spring fingers allow for a strong, elastic connection to a lamp mating panel and allow the retainer to securely connect to lamp mating panels of various thicknesses.