 So I had to use a skate strap. It's a piece of leather, a little buckle in it, and run that around the window post to keep the door closed. Of course, that meant the window was slightly open. So when it rained, the water would come in. But that was fine because in the floor there was a convenient hole for the water to drain out. And in some cars you'd drill those holes. I had a friend who had a convertible.