The Yaxis cable to the stepper motor is unplugged and it connects to the rotary motor. There should be adaptor cords included with the xTool rotary.
Those and a manual were included with my xTool RA2 rotary.
You can also search the Forum for information. Here is a little bit to get you started. Use the Forum, it is a goldmine of information.
Thanks for the comments…when connected the rotary tool makes this horrible noise…the action is smooth operating when un plugged but when connected to the laser it acts up making this noise and not rotating.
I haven’t found a solute this on any video
I had this same situation with my rotary the first time I connected it. Not an Xtool, but similar. There should be a couple different adapter cables included with the rotary. Try them until you find the one that will solve the issue.