I always latch the rear of the top first. It puts incredible stress on the windshield frame if the front is attached first and then you try to get the back to latch. As for seatbelts, maybe the car didn't even have them. My '64 (#1515) came from the factory without seatbelts (according to the data card.) The dealer had to install the lap belts (I've since put new shoulder belts in mine.) Great video!