u/Hitler-the-stripper

I just posted about the z-axis not working and a part I didn't know if it was needed. I don't need that part for it to function. Sorry about learning differences, yes I do need things explained out to me rather than just reading a piece of paper. It does this unprompted just turning it on and it immediately shakes and if lifted will slowly fall. 3D printing isn't my hobby I got it as I'm allergic to resin so couldn't keep making my doll and costume parts out of it, I've been using this for nearly a year and never had a problem until now.

In the middle of printing it start shaking loudly and wouldn't rise. Im guessing this thing needs to be actually attached so I just have to tighten it but I'm watching tutorials and I keep seeing this piece have a cord plugged into that slot. I've had this printer for nearly a year now but I don't remember anything being plugged up here? I can't see any loose/unplugged cords anywhere