Snorvey, my method will not work on a snapped cable, will it!
I can confirm that it most definitely does not! Although.....
Do you have any theory how such a light duty cable can snap?
.....It's possible that your method might have worked in my case if I had reached far enough into the bowels of the scoot and took hold of the cable further up. My cable had snapped either at, or pretty close to the plastic 1 to 2 cable splitter at the front of the bike.
It snapped because it was corroded and probably stretched.
Get the seat open, fix the cable and fit a hidden 'failsafe' in case it happens again!