Ducati Diavel Workshop Manual page 438

Handlebar unit: Hydraulic clutch control
Couple terminal (6) to the clutch master cylinder control and fix them with the screws (V).
Tighten the retaining screws (V) to a torque of 10 Nm ± 10% (Sect. 3 - 3, Frame torque settings) following the sequence
1-2-1 starting from the upper screw.
Locate the pipe (4) and seals (2) on the master cylinder assembly (3) and secure it with the special screw (1), without
tightening it.
Warning
An incorrectly positioned hose can cause clutch faults and interfere with moving parts.
For the positioning of the clutch hose (4) and retaining clips, see the illustration at the end of this section.
Tighten the special screw (1) to the torque of 23 Nm ± 10% (Sect. 3 - 3, Frame torque settings).
Operations Section reference