Ducati Monster 796 Workshop Manual page 189

Lights and indicating devices
Remove the headlight, as described in the paragraph "Renewal of the headlight" of this section.
To access the headlight bulb unscrew the four screws (1) and remove the cover (2).
High beam (HI)
Disconnect the wiring connector (3) from the headlight bulb (4).
Release the retaining clip (5).
The bulb (4) has a bayonet base: press and twist counter clockwise to remove.
Fit the new bulb (4), insert the tabs on the bulb base into the corresponding slots to ensure the bulb is correctly
positioned, push the bulb in and turn clockwise until it clicks into place.
Refit the connector (3) to the lamp (4), the cover (2) to the headlight, then tighten the screws (1).
Low beam (LO)
To change the Lo beam headlight bulb (6) see the procedure described above for the Hi beam headlight bulb.