Quote from professor: "HAHAHAHAHA!!!!! I have taught that material (not that textbook). I can see why it would cause the pioneers some significant mental health issues!"
To which my Kentucky friend replied: "Way too complicated... turn the jumper battery upside down use your finger to plug the vent + to + - to - vroom."
Hit me in the funny bone cuz I'm old, so I have had to actively stop myself from referring to it as the "tranny" at mechanical websites and pages I frequent.