Fuel Line And Vapor Line Quick Disconnect Fittings: Connect

Inspect the fitting and tube for damage.
Remove any dirt or obstructions.
Push the tube into the fitting until it snaps in place.

Fig 1: Pushing Tube Into Fitting
Courtesy of MAZDA MOTORS CORP.
Pull on the fitting to make sure the fitting is secure.

Fig 2: Pulling On Fitting
Courtesy of MAZDA MOTORS CORP.
Inspect for leaks.