TM9-2320-361-10 2-4. CHASSIS CONTROLS AND INDICATORS (Contd) Item and Function Key 7 8 9 10 11 Slave Receptacle located on right rear side of cab, is the plug-in point for an external power service required to slave start vehicle when batteries have become discharged. Fuel Tank Filler Cap is turned counterclockwise to open for fuel servicing. Battery Compartment Cover is opened to provide access to batteries. Toolbox Latch Handle is turned up to unlatch and open toolbox. Radiator Draincock is turned counterclockwise to drain coolant from radiator. Key 12 13 14 15 Battery Filler Caps are removed to check battery fluid level. Oil Dipstick is removed to check oil level. Engine Oil Filler Cap is removed to add oil. Radiator Cap is removed to add coolant. 2-9