The small Matchbox on the left side. I can't see it on the parts diagram and ours was knocked off the metal mount. Still connected and the bike runs ok but I am concerned just in case.

Found it. It looks like the fan relay so I will need to see if it's earthed.

Voltage regulator. You do need it.

velcro and/or cable tie it back somewhere secure.

The aluminium mounting bracket can break , but unit can still work.

Same part found on Gas Gas (PART # L310001)

Thanks Arnoux. I did check with SXS as well. Credit where it's due Steve still helps when he can.