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If you had the arrow, both should point to the middle/rear of the engine bay. If you look at the strut top you can see that its not centered by the bolts. You want the center as far back and inwards as you can get by rotating the position of the bolts. This gives you maximum camber and caster. I think its maybe .5 degrees of camber with some +- to it. Not much but its the most you can get stock.
I had the same questions and ended up using my own graphic to summarize and confirm with the wise minds here (graphic below). The OEM parts were all there and it was oriented as in the red. I used the green "max camber" setting when I replaced the stock shocks and springs...Tokico Blues and RB.