Like said before in your other topic you need at least two limit switches in the corner where your machine homes. You need one on the x-axis and one on the y-axis. When hitting these switches, the machine knows where zero (home) is. From there on it can work within software limits and possibly with a second limit switch on the x-axis and y-axis. These are optional.
In terms of wiring: you need to get a GND to the switch and as far as I know a -. Do this for each switch.
So, place the limit switches where your machine homes, or switch the homing position in the controller parameters such that it matches your limit switches position.
Also, if you lack the information you can just loosen the belt and/or pulley and see what the machine does. Manually actuate the switches and see what happens. Be creative
Please show us some pictures of your laser cutter regarding the position of the limit switches and mark the corner where the machine performs its homing. (preferably in the other topic).
For reference, this is the other topic: