The negative cable, which is normally connected to the negative pole of the battery, is fastened to the crankcase. From here, the cable branches off and splits up within the electrical system to carry the ground connection to the different elements in the system.

The image shows the ground connection on left side of the engine crankcase.
The battery charging circuit and power distribution
Electrical power for lighting and signalling devicesRefitting the rear brake control
If the pushrod (18), clip (30) and fork (31) assembly has been dismantled,
reassemble it by screwing the nut (29) onto
the rod (18) and then screw the rod into the fork (31) to obtain the measurement
indicated in the figure.
Block the rod and tighten to a torque of 7.5 Nm +/- 10% (sect. 3 - ...
Refitting the timing covers
Locate vertical cylinder external cover (25), horizontal cylinder external
cover (3) and central external cover (1) by
starting the screws (4).
Apply the recommended threadlocker to the screws (4).
Tighten the screws (4) to a torque of 10 nm (min. 9 Nm - max. 11 Nm) (sect. 3 -
3, Engine t ...
Replacing the high and low beam bulbs
Before replacing a burnt-out bulb, make sure that the new
bulb complies with the voltage and wattage specified in the
"wiring diagram", page 179. Always test the new bulb
before refitting any parts you have removed.
Fig. 150 Shows the locations of the low beam bulbs (lo), high
beam ...