Now here is something of a puzzle Whilst i had the steering column cowl off, sorting out why the indicator stalk doesn't self cancel, i happened to spot this tiny toggle switch hidden away See pic It looks like it could a factory fit anyone any ideas?
I had a 'hidden switch' on my MGB many, many years ago.
it was a single-pole changeover switch that diverted the switched output from the ignition switch to the horn wiring: a cheap and effective immobiliser and alarm!