Didn't know any dolys had the horn button in the steering wheel.
Almost like it was just a joke or something..
It must have lost something in the translation.
I think someone has mistranslated "small chassis cars" ie Herald, Spitfire and their derivatives, as "small saloons" the less well known term for the Dolomite range and it's variants and predecessors.
All the small chassis cars have the horn push in the steering wheel (with the exception, I think, of the 1500 Spit) and need some sort of earth connection across the lower coupling, which, IIRC, originally comprised a cable between the 2 clamp bolts. Also a second, oft mislaid, earth for the (rubber mounted) rack body.
Whereas the Dolomite range mostly has it's horn push on the indicator switch and switched power, rather than the switched earth of the Herald et al. Though i'm not sure how the 1300FWD one works.
Apologies if I'm teaching Granny to suck eggs here!