Do not know how to change the auto adjust cable that adjusts the rear brakes. on 1994 Ford E-350

Cable inside the rear brake drum is broken and I do not know how the upper end disconnects. There seems to be a large, steel washer but I do not know how to remove it in order to replace the cable. I have the 3.5" wide shoes.

Asked by for the 1994 Ford E-350 will have the repair manual info and it is very reasonable.
If I wanted to buy a manual I would not have asked for help. Fortunately, the parts guy at O'Reily, a real mechanic, told me exactly how to do it and didn't even try to sell me a manual.