Ducati Diavel Workshop Manual page 105

Fairings
Place the tank plug cover (23) on the vehicle and connect connector (E) to the dashboard (F); push connector until an
audible click indicates proper engagement.
Apply threadlocker to the screws (25).
Fit the tank plug cover (23), fit spacers (24), and start screws (25) and screws (16).
Tighten the screws (25) to a torque of 2 Nm ± 10% (Sect. 3 - 3, Frame torque settings) and the screws (16) to a torque
of 0.33 Nm ±10% (Sect. 3 - 3, Frame torque settings).