When replacing a vinyl top on a 69 GTO, there are two separate pieces. The main large section of vinyl that covers the entire top/sides and then there is a small strip that goes underneath the length of the rear window. Which piece is laid down first? Also, how are the ends that overlap each other, done? Are they just folded over to the same size as the seam and line up with the large section seams and then glued down? I have watch numerous videos on top installations but none show how to do this particular area. Any expertise/videos would be appreciated. Thanks.