Headlamp washer pump

Fig 1: Connecting/Disconnecting Washer Hose Coupling (Headlight Cleaning System)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect by depressing clip - 1 - in direction of - arrow - and then separating coupling from the jet.
Reconnect by keeping clip - 1 - depressed while pushing coupling onto jet until it engages.
Check for proper fit by attempting to separate coupling without depressing clip.