If you could work in an internal wood reinforcing rail for the awning under the existing aluminum rail so that the glass would be sandwiched to spread the stress, you could probably tag off the existing aluminum rail for the awning anchor, or add a 2nd rail alongside bolted to the existing rail if there are issues with having enough wrench room; depends on the width of your internal rail as that would have to handle any torque from storm winds.
Although the weight of the awning itself is little when distributed over a 6 to 8 ft length, the design has to consider the stress with wind/storm issues trying to make a sail out of your awning - which can be substantial if your awning surface area is 8x8 ft - 64 square ft of sail can generate a lot of force with wind trying to lift it straight up.
Yup, I'm a retired mechanical engineer.............