TM 10-3930-664-24 D. INSTALLATION 1. Install    blackout/service    light    switch    (1)    onto instrument panel (4) using screws (3). 2. Install  three  handles  onto  blackout/service  light switch   (1)   using   screws   (2),   ensuring   proper orientation. 3. Connect                electrical            wiring              to blackout/service light switch (1). FOLLOW-ON MAINTENANCE: Connect battery cables (para.  2-78) END OF TASK 2-191