For the benefit of new users (like me) who discover this thread at some distant future date - and who don’t have a soldering iron/soldering skills - check out Wago connectors as noted in this thread: Wago Wire Connectors
Just set up two of the switches in parallel on a small 12V power supply I have and they seem to work a treat. Will play with resistor values now, thanks to the hints Martin left in the video I linked above, to get the voltage down to 5V for the trigger value for the Arduino. If you don’t drop the voltage (and you’re powering them with more than a 5V supply) then you will likely damage the Arduino controller inside the Longboard. Don’t do that.
-Jeff