Ducati Hypermotard Owner's Manual page 192

Disconnect connector (3).
Release the clip (4).
The bulb (5) is of the banjo-type: press and rotate
counterclockwise to remove. Fit the spare bulb by
pressing and turning clockwise until it clicks.
Note
Do not touch the transparent part of the new
bulb with the hands. This would cause it to blacken
thereby reducing bulb brilliancy.
3
5
Fig 141
4
5
Fig 142
191