[Aussie Mike]

There is a channel on the center of the top edge of the windscreen frame that the soft top front bow locks into. It then clips down one each side of the frame.

I believe that angle bracket pictured is supposed to screw to the bottom edge of the windscreen frame as well as the body. It's job is to stop the soft top from lifting the top edge of the windscreen frame away from the glass.

Cheers