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If it doesn't involve the cable near the pulley, a quick, simple repair would be to use an electric crimp connector between the two pieces of broken cable. The previous owner of a 1950 Pacemaker I owned had made this repair and it lasted at least the 29 years that I owned the car and worked just fine every time I used the wipers.
You should be able to buy cable at your hardware store. You will then need two spliceswith the new section around the pivot. Worked for me.