That video is good but doing it the hard way. Follow the wires out of the switch assembly to the bottom of the Nacell on the right hand
side. With the handlebars turned left, gently jiggle and pull those wires and the harness out, 1 plug - pull another couple inches to the 2nd plug. Make sure all are tight or if you want to make the switch useable pull out the 3" section and reconnect, now the switch will work and hopefully you have found your issue.
- Mike