If you have the instructions in Chinese you can you the translate app on a phone with the camera and that should do it.

Also if you have a multi meter you can sort the wire out into pairs they could be 2 switches inside the top one for the tool setter and a further one lower down to wire into the e-stop chain .

Or it could just you one switch and one pair of wire would be for the electronics.

Can you post a good picture of the instructions