TM 10-3930-659-20 18-2. BATTERY WARMER AND CABLE REPLACEMENT (Con't. a. REMOVAL 1. Remove battery warmer cable (3) from battery warmer (2). 2. Remove two locknuts (4), screws (1), and battery warmer (2) from battery box (6).  Discard locknuts. 3. If damaged, remove wooden Insulator (5) from battery box (6). TA706772 18-4