Ducati MONSTER 821 Workshop Manual page 689

Connect the exhaust valve motor cable (Refitting the exhaust
system).
Fit the two spacers (26) on cover (27).
After having fitted the two spacers (16), close cover (27) and secure voltage regulator (6) in place with the
two screws (5), battery mount cover.
Tighten the two screws (5) to a torque of 8 Nm ± 10%.
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