Quick pic, a little blurry. The cable runs thru a channel at the seat post junction.

My triple on our Comotion was a 52/44/32 with a 12/27 out back, now we are running a 52/36 and a 11/32. We give up our previous lowest gear with this but with a much lighter bike, easier and more timely shifting and better feel with the gates belt when we stand it has not mattered. I think we could always go to a 34 in back or keep a smaller set of compact rings(50 or 48/32) for some crazy climbing if needed.
The new bike was somewhere around 25 lbs with my makeshift weighing as I finished assembling. With cages etc it's probably 26. That makes it a solid 12 lbs lighter than our old bike!!