ā'INSTALLATION INSTRUCTIONS FOR L-992 AND L-951 USE ONLY WITH HALO L-640 & L-650 SERIES TRACK SYSTEM ONLY Instructions for L-992 Step 1: Assemble mounting strap to existing junction box with 8-32 x % screw (2). (if mounting directly to cei ing use other type screws not provided). Step 2: Assemble collar on non-traded end of tam and lock in pace with 6:32 x % screw (2) slide into āUā¢ groove of mounting strap. Slide remaining collar on sm and lock in pace with 6-36 x Va screw (2).