What is the part that plugs in here? I can only find one mention of it searching. Diagram shows is a height alignment sensor. I can not find this part searching for it. The wires broke off. I am considering trying to solder them back on but I would just feel better buying a while new piece
That is the load cell/ strain gauge.
It does the automatic zoffset measurement my pressing the nozzle against the bed. It then reads the load, same as a kitchen weight scale, to determine when it touches.
Frankly, you are better off leaving the wires off. The auto zoffset is proven to be unreliable.
You then do the zoffset the old school way, only when you change the nozzle or hotend. “Paper test and baby steps”.
The auto calibration at the start of the print (locally on the screen) needs to be turned off every time. Or print straight from the slicer.
I can send you more info if needed.
Otherwise you need to try a warranty claim, since it cannot be fixed and not available as a spare part.