Looks good to me. The awning roller will not be flush with the wall. The arms will be seated against the wall supports. You will notice the movable arms are designed with an offset on both sides that fit over the wall supports. To assure it goes out and back in correctly all the time, I suggest you deploy the awning, measure from the white cap on each end to the edge of the material and center the material on the roller and mark the edge of the material on the roller. Retract the awning and then deploy it again and check to see if the material moved on the roller. If it didn't move, drill a 3/16" hole thru the hem of the material on both ends like the attached picture and using a large flange pop rivet, rivet both hems. The material without being riveted tends to move on the roller causing it to bind when trying to close. The rivets prevent this and will not harm the material.
The picture shows this awning deployed too far and is for the purpose of showing where to rivet. The awning should only be deployed far enough that the material is on the top of the roller and there is no valley made with the roller. I hope this is what you were wanting.