On mixte bikes the rear cable stop is usually in the middle of the diagonal stays. Some mixtes have cable guides on the stays for sidepulls, but most don't.

There seems to be an assumption that double pivot sidepulls are better than centerpulls, but are they? They are better than single pivot sidepulls, but most of those were not better than centerpulls. Centerpulls with good pads should stop just as well as the double pivot Tektros.