While its a nice image, it doesn't really demonstrate the effectivness of the kink in the PMA. The payload here, Clearly an MPLM, is in the aft portion of the PLB. and because of the short length of the payload itself, the arm gets nowhere near the PMA.
Looking around I am not sure there is a single picture that demonstrates the benefit of how the PMA's shape position the PLB.
The biggest ISS payload carried up by the Shuttle was Kibo, here on STS-124. I quick look did not pull up picks of the grappling, but I at least found one of the rendezvous, so you can see its position in the bay, and just imagine how having the bay's position altered by the shape of the PMA benefits the astronauts in charge of the robotic ops.
And even with the MPLM. Fly a Shuttle mission to the ISS in Orbiter and see how tricky it was to get the MPLM out of the bay and attached to Harmony using the SSRMS.