Where does this gasket go? Countertop dishwasher faucet adapter
I figured it out. I’m not sure if this is the groove @ojait was referring to or not, but I was able to maneuver the rubber gasket into the spot inside the female side of the adapter below the ball bearings. I used a chopstick. The seal now is slightly leaky, exactly like it was until I messed things up yesterday. Thanks to all for taking a look!