I am mounting a TV on a wall (see photos). There is a 7/8 inch gap between the drywall and the exterior, and a single metal vertical stud (Florida) as indicated. I want to center the TV, which is also indicated. I generally use toggle bolts for mounting on interior walls, but I do not think the gap is deep enough for them to open.

How should I mount here?
Should I take advantage of the concrete (cinder block?) exterior wall?

[![mount on wall in position](https://i.stack.imgur.com/Q4JZB.jpg)](https://i.stack.imgur.com/Q4JZB.jpg)
[![showing depth using cable outlet](https://i.stack.imgur.com/zlMuC.jpg)](https://i.stack.imgur.com/zlMuC.jpg)