Players, My $0.02 worth. There is a difference between "Frame prepped for a bike rack/cargo tray" and "Frame prepped for a receiver hitch". The "bike rack/cargo tray" is just that, a pull out tray that the bikes and cargo sit on while traveling. When not in use, it slides under the rear of the unit. I think that is what the brochure is referring to.
Now after saying that, I need to determine how to attach a receiver to the rear of mine to double tow a trailer.