I tried the best I could with perspective. Basically when you look at the rocker shafts and pushrods head on and perpendicular of the head, the contact is at 6 o clock. This may or may not have relevance but I have zero play in these things. Then again, I'm at #1 TDC and this is exhaust on #2.
EDIT : if needed, here is a pic of the rocker making contact with the valve.