Here we will install the Power Supply Upgrade Kit from http://cohesion3d.com/power-supply-upgrade-kit/
You should have our Power Brick with AC cord for the USA, a small black and green adapter, and red and black wires. If you are located outside the USA, you will either need to source your own power cord for your country/ electrical socket type, or an adapter to go to that from the "2 Prong USA style (C7)" connector on the provided power cord. In technical terms, the power supply has a male 2-pin C7 connector, and you need a cable that will go from that to your electrical socket.
Contents of Power Supply Upgrade Kit:
Tools needed include diagonal wire cutters, wire stripper, and a flat head screwdriver.
Use the wire stripper to strip both ends of both wires. You don't need much, maybe 5mm off each end.
Loosen the screw terminals on the adapter, then insert the red wire into the lower screw terminal as indicated by the + on the adapter. Tighten the screw terminal.
Now install the black wire into the other position of the adapter indicated by - and again tighten the screw terminal.
Over to the Cohesion3D Mini board. IT IS VERY IMPORTANT THAT YOU PLUG THE RED AND BLACK WIRES IN THE CORRECT POLARITY. PLUGGING THEM IN WRONG WILL CAUSE DAMAGE.
Loosen both screws here in the blue "Main Power In" screw terminal at the upper left of the board. You can also stick your flathead screw driver into the wire receiving opening and gently pry up on the contact to make the opening larger for the wire.
First, install the red wire into the upper position indicated by + then tighten the screw terminal.
Then, install the black wire into the lower position indicated by - then tighten the screw terminal.
Plug the barrel of the power brick into the adapter piece.
Plug the "Figure 8" end of the AC Power Cable into the power brick. It will go in either way, there is no polarity for AC.
This is what you will have so far:
Do the rest of the Mini board installation as outlined in the main guide here: https://cohesion3d.freshdesk.com/solution/articles/5000726542-k40-upgrade-with-cohesion3d-mini-instructions-
BEFORE YOU POWER UP:
Clip the wire that carries 24v from the K40 Laser Power Supply to the Large Plug Power Pigtail that is plugged into the Mini board.
You are all set!