TM 5-3895-373-20 7.21. REPAIR ELECTRICAL HARNESSES - Continued. C. INSTALL. WARNING When  connecting  batteries,  connect positive battery cable before connecting    negative    battery    cable. Failure   to   connect   batteries   in   the proper sequence may lead to electrical  shock  or  short  circuit  and result in personnel injury. 1. RECONNECT POSITIVE BATTERY CABLE (6) AND BATTERY NUT (4) TO POSITIVE TERMINAL OF INBOARD BATTERY. 2. RECONNECT   NEGATIVE   BATTERY   CABLE (5)  AND    BATTERY    NUT    (4)  TO  NEGATIVE TERMINAL OF OUTBOARD BATTERY. WARNING Electrical    insulating    varnish    fumes can be harmful if inhaled.  Use only in a well ventilated area. Avoid prolonged    exposure    to    fumes.        If personnel   become   dizzy   or   drowsy during   use,   get   immediate   medical attention. 3. APPLY  ELECTRICAL  INSULATING  VARNISH TO BATTERY TERMINALS. 4. INSTALL  BATTERY  TERMINAL  COVERS  (3) ONTO BATTERY TERMINALS. 5. INSTALL   BATTERY   BOX   COVERS   (2)   AND BUCKLE BATTERY BOX HOLDDOWN STRAPS (1). NOTE FOLLOW-ON-TASKS: Close rear top left access door per TM 5-3895-373-10. Install left access cover per TM 5-3895-373-10. NOTE Close other access door(s) and install access cover(s)  removed  during  this  procedure.    Refer  to paragraph 2.22 and to TM 5-3895-373-10. END OF TASK 7-168