It looks like that wondow has a metal frame around it, and the hinge is welded to it. Not that it couldn't be done and mounted to the glass itself though. If I go the hinge route it will have to be easily removed from the mounted point or hinge somehow since I've decided beyond just the pop out window I want it to completely be removeable. If I can get that with a pop out hinge set up that would be the best!