Ducati Monster 796 Workshop Manual page 444

Tail light-number plate holder and locks
Fit the lock lever (29) inserting the lugs (C) in the slots (E) as shown in the figure.
Start the nut (28) in its thread onto seat lock (27) and tighten it to a torque 3 Nm ±10% (Sect. 3 - 3, Frame torque
settings).
Lay down the rear wiring (A) onto splashguard (1) as shown, routing it under the lock (27).
Lay down the lock cable (26) onto splashguard (1), as shown in the figure, insert it in its seat (F).