Sorry, no. It was my way of suggesting that you could post oneAlso, do you have the link for the thread, 'c3 battery Quick release' as I can't seem to find it, would be helpful as would rather be able to unscrew it off rather than cutting it, subsequently losing slack.

If you did chop it off, then you would have one spare to play with.
If chopping bits off sounds too drastic, missing lincs suggestion following citroens advice may be less drastic.
I found some different quick releases, but they still require chopping of the cable
Pair of Quick Release Heavy Duty Battery Clamps for CITROEN C3
Ah, now this looks better, I am not sure if its going to fit, so that worth checking, but
Battery Cut Off Switchthis device clamps to the battery and then the battery live cable clamps on to the other end. The black knob is a 'quick disconnect' and there is a silver coloured bolt that clamps the the battery terminal but can also be used to allow a heavy ring crimp to attach for amp power. (as mentioned previously - a fuse is a must, nice and close to the battery).
crimp/solder for heavy duty cablehere.
or for smaller gauge cable, these here.