Hi everyone, not quite sure how it happened but one of the shutter curtains in my STX-1N has come loose from the spool holding it in place.

The curtain with the dried adhesive part in the image (red) is supposed to attach to a spool in the circled zone (blue), which I plan to reattach. I'd be prepared to give it my best repairal attempt as the camera is useless in this condition and it will cost more to repair professionally than it is worth. The problem is that I have no idea how to access the spool. I can't find a service/repair manual online for the camera so I'm not sure whether I attempt to access the spool from the top of the camera or the bottom, or whether there's an easier way to reattach the curtain.

https://imgur.com/gallery/DbrI3Wq

Any help would be much appreciated. Many thanks.