Porsche 911 Carrera Owner's Manual page 312

Installing auxiliary headlight
Ensure that the cables are inside the guide
(arrows) properly.
310
Practical Tips, Emergency Service
Caution!
Risk of paint damage if the auxiliary headlight
is inserted into the front apron when tilted.
Exercise caution when inserting the auxiliary
headlight into the guides of the front apron.
Ensure that the guide of the housing is inserted
into the guide A of the front apron.
Push auxiliary headlight into the front apron
until it is felt to engage.