We get many questions about convertible tops with separate windows. Most folks assume that the rear window is an integral part of the top. In many cars that is true, but in American cars, it is more common to find the top and the window to be two separate parts.The window unit consists of the part that you see through (Which may be glass or .40 gauge clear vinyl) and the material that is used to fasten it to the car. This window unit is fastened to the car body and folding mechanism, then the convertible top is attaches covering the edges of the window unit except for the bottom.
This short video will show you the procedure.