Remote trunk battery disconnect switch lever '71 Duster pics please

Why do you even need to employ a lever for a battery cutoff.
I have never used one on my cars

Never used the rod type, or never used a cutoff?

They like to see it at the drags and if fast enough it's required. Even for a street car its a handy thing to have. I.e. easy disconnect for the winter, or storage, or when doing electrical work. I shut mine off every time I park it in the garage.