It's a 1 cent shunt used for monitoring the current consumption of the motor. If the current spikes, it means something jammed it(or it reached the top/bottom) and the microcontroller will cut power to the window lifting motor.
Maybe Tesla can look into that cutting edge tech once they wrap up humanoid robots.
I don’t have/want to cybertruck, but I wonder if it would stop properly if you were to have something at the bottom blocking it.
If you get pinched close to the hinge your reaction won't generate a lot of torque on the motor, it will be less than the weight of the trunk itself.
Take their power seats not stopping for obstructions: most auto manufacturers do not make their own power seat modules.
They buy those from suppliers like Bosch and Continental (yes, the tire guys): https://www.continental-automotive.com/en/components/seat-co...
But Tesla loves "innovations" that are just an excuse to vertically integrate in an inferior manner. That's stuff like the "superbottle" which integrates a bunch of parts you could normally replace independently with common parts into one (super easy to integrate on the assembly line) package
Usually the controller will reverse the motor instead of just cutting it. You want the window or door to stop strangling the cat, not just do it somewhat more slowly.
source: experimentation with power windows and doors, garage doors and similar objects. I actually started doing this after a misadjusted garage door strangled one of our cats.