I installed this in the rear window of a Prius. The barb connector was pointing away from the rubber hose, so I had to insert the nozzle partially into the hole, connect the hose (which needed to be heated with a heat gun), and then rotate the nozzle before fully inserting it into the hose. Opening. The old nozzle broke, so I don't know if the notch was pointing the opposite (correct) direction. However, as others have noted, the nozzle sprays too high, goes all the way through the windshield, and doesn't use spherical nozzles so they're not adjustable. I'm guessing it's for the windscreen where the spray needs to be directed up.
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