Hi, the diagram below shows how you're supposed to assemble the whole tip.
You should have found a very small washer in the tip's package, which you can temporarily slide on the tip right before the OWB, in order to push the OWB a little futher down the 8mm hole, but then you have to take the washer out, before inserting the tip-side standard bearing, because the washer is not supposed to stay there during play.
As the diagram says, the side of the OWB which has a little arrow and writing on it should be pointing AWAY from the tip, for a left-handed player.
Hope this helps...