Ducati Monster 1200S Owner's Manual page 280

Connect the positive pole of the external device to the
battery positive pole (3).
Connect the negative pole of the external device to
engine mounting screw (4), after removing both
covers and canister on engine LH side.
To remove the covers, refer to "Removing the battery"
page 282.
Attention
When connecting the positive pole of the
external device to the positive pole (3) of the battery,
pay utmost attention not to touch any other metal
parts on the vehicle.
3
4
Fig 196
Fig 197
279