Sometimes the old fashioned way is better. Finding no help in subaruoutback.org forum or anywhere else on Al Gore's Information Superhighway, I asked the Subaru Parts counter to print an exploded view drawing for me (attached) when I went to pick up my special ordered PCV valve for my 2010 OBW 2.5i.
Pic of new PCV attached as well.
PCV was VERY easy to replace* once I had the exploded view and could see where it's located. No need for a step by step DIY. Just have a small 5/8" conventional hose clamp handy if you, like me, have no pliers for clic hose clamps. https://www.youtube.com/watch?v=pjujzEywNCs
I can never get 'em back on with pliers or dykes. To get the clic hose clamp off, insert small flat blade screw driver in the slot on the side of the clamp and rotate.
* When I came back in the house and told my wife it was real easy,
wife said, "how come I heard you yell the F word real loud"
I replied, "how many times?"
"That's right, like I said it was real easy."