Thanks Mike.
The Z-Axis torch switch hooks to the Z-Home function inside of the CandCNC control box. Looking inside of the box it's towards the bottom center, slightly offset to the right if I recall correctly and has several spade style connectors for various limit and home switches. You just hook to both of the Z-Home spade connectors and then to the bottom two pins on the Z-Axis switch. In addition you need to enter some offset information for the Z travel and if you need help with that, let me know. You will need to drill a hole and install a cord grip to get the wiring into the CandCNC box. If you need any part numbers just shoot me a PM. I source most of my parts from Mcmaster and can bring up my 15 past orders to give you any part numbers you may need. I used 18GA two conductor orange SO cord for that switch.
If you look at these pictures you can see where I entered the control box (I also installed a connector in line so I can disconnect and fully remove the box from the table as needed), and how it connects to the Z-axis switch.