You'll get better shifting performance with the derailleur more forward. Best to have it directly under the lowest part of the cogs. You can see in the last photo that it's about 1/2" rearward of the centreline of the cogs. This moves the upper jockey wheel away from the cogs. You get better shifting performance when the jockey-wheel is closer to the cogs and placing the upper-pulley directly under the cogs gets it as close as possible.
Then you adjust the B-tension bolt to give clearance for the largest cog and that's it.
