Rear seats don't have side impact air bags. The only thing that reaches back there is the HPS (head protection system).

In any event, you're right about the LATCH Mounts being "in the way" because the center seat does not have the it's own "bottom two" LATCH points - the ones near the seat hinge. It has a latch point behind the seat, but you have to use the side seats' LATCH points. The only alternative is to go old school and use the seat belt and then use the LATCH point behind the seat.

That or to use the full LATCH system for the side seat.