first gen 12v injector Q?s
 

workin on a truck that the kid that owns it did a injector swap on it we finally got it runnin and the injectors where leakin so we pulled one of the leakers and just wanted to make sure that the square cut groove in the injector doesnt get a o-ring, right?

Are you talking about where the return line attaches?

http://cf.mp-cdn.net/d7/b2/b84937958...40723ce709.jpg

no those get a copper crush washer. the groove im talkin about is right below the silver ball on that pic.

nope