So I went out and took some measurements off my dismantled axles and came up with this. The lengths are to scale so all of these should be exactly as it sits when assembled. If I look at my axles, the retainers and abs ring are stacked right up against each other with no gaps.



Based on this, I'm not convinced that it makes sense to flip the inner retainer so that the chamfer goes toward the wheel. Based on my measurements it looks like the seal should sit right in the middle of the non-chamfered area of the retainer. I'd also be concerned with the square side of the retainer hitting the raised portion of the axle tube just inside the inner seal if they were flipped.