Ducati SPORT 1000 Manuel D'utilisation page 129

Number plate light (fig. 51)
To expose the number plate bulb, withdraw the bulb
holder from the number plate holder, then extract the bulb
and replace it.
Note
The bulb holder has a tag (A, fig. 51) to aid removal
from number plate holder without risking to tear the
cables.
E
54
A
fig. 51