TM 10-3930-664-24 3. INSTALL    MASTER    SWITCH    (4),  GAUGES (5), AND ETHER SWITCH (10). a. Install master switch (4) using screws (5). Attach electrical plug. b. Insert light  kits  (8)  into  bottom    of  gauges (6).     Install   gauges   and   gauge   brackets using nuts (7). c. Install   ether   switch   (10)   using   nut   (11). Install  rubber  switch  cover  (9)  onto  ether switch. CAUTION When  connecting  power  wires  from  I terminal    on    gauge,    ensure    correct installation.    Connecting  power  wire to S terminal will destroy gauge. 4. CONNECT ELECTRICAL WIRES TO SWITCHES, GAUGES, AND LIGHTS. FOLLOW-ON MAINTENANCE: Connect battery cables (para.  2-78) Install instrument panel brace (para.  2-58) END OF TASK 2-181