I build an electric skateboard and I need to add a external switch to my ESC to be able to put all my electronic in the same enclosure.
-ESC ( banggood : https://goo.gl/4n8kzB )
Step 1: Open the ESC
Very simple, unplug the wire for the fan and unscrew the 4 screws that hold the heatsink. After, with a screwdriver, remove the bottom part. Lift the last part of plastic to be able to see the little switch.
Solder the wire on the pushbutton. I put shrinktube to protect the wire and some hot glue to make the piece stronger. After solder the wires on each side on the ESC's switch.
Step 3: Close the ESC
I made two little holes in the top part of the enclosure to be able to close properly the box. Close the enclosure and your done!
If you have any questions about this instructable, feel free to ask me! :)