Help on master / kill switch wiring

[Turby]

Can any kind soul out there give me a wiring circuit for installing a master / kill switch into a race car which uses a single wire alternator. (one big wire from alternator to battery, no other wires on the alternator).

Ideally I'd like to place the switch on the negative side to avoid running lots of heavy power cables around.

I've searched the internet, some say its possible others not... which has left me somewhat confused