Slip a hollow sleeve over the end of the cable to release the locking dogs where it joins the drum.

Copper tubing the right diameter, something similar or even a socket can work.

With a socket, you may have to spin it by hand to release all the dogs.

I use a deep well socket so I can hold it better.

But no matter what you use, apply gentle pressure to the cable on the back of the plate so you can feel it when the locking dogs start to release & then wiggle it out from there.