I have the same bags on my tourer, though yours look much better in black with nice chrome trim.
Here's how they're mounted. Sorry I don't have a rear view.
The rear turn signals are integrated into the bag, and they're pretty tight to the frame.
My seat doesn't open all the way, but it does open enough to pull the battery. I just have to put something in there to keep it propped up. I would sacrifice some seat opening to pull them in a little more, but that's just me.
They do look purdy!
I carry a brief case with laptop and papers on many days between home and work. It fits perfectly in the bags. I can even do a small grocery run!
Looks great mate. I hope you enjoy them.