10-13-b #3

I'm wondering if someone can please elaborate on this picture in the book..All other shoulder turn types are pictured to the end of the follow through..This one is before impact...

If you're using 10-13-B wouldn't you try to return your right shoulder to that point (on plane) at the end of the follow through? or does the right shoulder go down on plane at this point and stay on plane until end of follow through? or does the shoulder smack into the plane on a level move parallel to the ground?

Thanks for your help,

Mashie72