It’s “A” , and you can’t break it.
It pushes down, er, toward the floor, and like others have said takes a lot of force. It really oughta have a handle a guy can grab. When I first had to use mine to get things operating I had some success stepping on the pedal as hard as I could thus removing some pressure from the lever, and using a 2x2 to push the lever, then releasing the pedal with my foot.
After that I restored the original vacuum lines to spec, restored a working neutral switch and the auto feature immediately resumed and I’ve never touched that lever again. Not much work for an efficient little system. Good luck!
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