When using the SL-3 fixture, mount the bracket to the installed junction box (1-gang box) or mounting surface. When using the SL-5 fixture, mount the bracket to the installed junction box (1-gang box/2-gang box) or mounting surface. If mounting the SL-5 to a single junction box, the top tab of the metal bracket will have to be snapped off. Run the wiring through the mounting bracket.