TM 10-3930-671-24 (2) Installation. NOTE Install all wires on switches as tagged and marked prior to removal. (a) To install master power switch (14), proceed as follows: 1 Install master power switch (14) on forklift (12) with switchplate (25), lockwasher (24), nut (23), lever (22), and screw (21).  Tighten nuts securely. 2 Install two wires (20) on master power switch (14) with two lockwashers (19) and nuts (18). 3 Install two wires (17) on master power switch (14) with two lockwashers (16) and nuts (15). (b) To install glow plug switch (10), proceed as follows: 1 Install two wires (13) on glow plug switch (10). 2 Install glow plug switch (10) in forklift (12) with button (11).  Tighten button securely. 3-49