Triggering of engine and gearbox c) Electrical gearbox triggering The electrical gearbox triggering for ahead and astern can be connected up via plug X8. Plug X8 is wired up direct to the engine plug X1 and and then to the gearbox plug X3 on the flywheel housing. The mating plug for X8 is delivered with the system. Terminal box Emergency stop X9 Gearbox astern Gearbox ahead 5 3 10 X10 X8 Plug X3 (Gearbox) b3 c2 d3 Plug X1 X2 X1 Terminal box 1 2 3 Plug X8 1: Gearbox ahead 2: Gearbox astern 3: ”–” Negative 105 TOP