J.W.
So it looks like an after market product. I have only had the systems that came with cars. Both vehicles were vans, both had heavily tinted windows, one actually had pull down shades.
Video screens are backlit so light coming from the front makes the picture impossible to see. About the only thing that will work is a shade or something that would block the light in the back of the vehicle.
Why I commented that you appear to have an after market system is that it isn't designed with that car in mind. Like when my vans were designed they tested the screen, its positioning, and what options were needed to make the screen visible in all lights.