Don’t loosen the pinch bolt. Twist it with your fingers in the direction of the original twist. The wires will eventually settle as close as they can to their original positions. Add super glue, steel putty, or cable crimp.
Many thanks. Steel putty sounds like a good excuse t0 buy yet another kind of mystery gloop. But maybe I'd regret it.
I wouldn't want to bother with a frayed cable that close to the pinch bolt.
If it's after the pinch bolt, it will make precisely no difference at all. Other than looking fugly. And making your fingers bleed if you try to wind the fine, pointy and ouchy strands of the cable back into place.
Many thanks. Steel putty sounds like a good excuse t0 buy yet another kind of mystery gloop. But maybe I'd regret it.