The fixed cup get screwed all the way in, on the drive side.
The adjustable cup goes in the non-drive side as far as it needs to so that the bearing run nice but there's no lateral movement. Lock ring then whacked on good and tight.
Counter intuitively the axle goes in in such a way that the end with the longer flats goes in the non drive side if that makes sense? It's not symmetrical, in your picture the side with the longer flats are on the right hand side.
Coupla notes:
The fixed cup get screwed all the way in, on the drive side.
The adjustable cup goes in the non-drive side as far as it needs to so that the bearing run nice but there's no lateral movement. Lock ring then whacked on good and tight.
Counter intuitively the axle goes in in such a way that the end with the longer flats goes in the non drive side if that makes sense? It's not symmetrical, in your picture the side with the longer flats are on the right hand side.
Hope that's some help to someone.