Hatch-mounted Thule bike rack out of the question?

I have a Thule Raceway 3 bike rack on my Prius 30. It hooks to the top and bottom of the hatch.
The top of the Prius 50 hatch is glass.
I suppose hooking a rack onto glass is out of the question?
Thule doesn't include the ZVW50 on its 'find my car' feature, but that might not be an indication.

 

I think I've answered my own question.
On the Thule Buyer's Guide if 'Rear' is selected for Mount Locations, under Select my car the link "I can't find my car on the list" appears.

Select your car
To get a recommended Thule product, you need to supply your car information – make, year, and model.

The list only shows cars that have been successfully tested with a Thule carrier. If you cannot find your car in the list it is likely due to one of the following reasons:

• your car has a plastic/weak/large spoiler
• your car has a plastic/glass or a divided rear door
• the car manufacturer does not allow the use of rear door-mounted carriers on this car
• your car is very new to the market (available for less than six months)

Please read the fit tips carefully for restrictions on spoilers etc.

As a Mythbuster might say, "there's yer problem."