behind the black cover on the left side of the bike (with the blanking plug in it) is a steel bracket to which the cover is fastened using the 2 torx screws. Somewhere close to this will be will be a small plug as I described . It will have a small piece of blue tape wrapped around the end to identify it. It is live only when the ignition is switched on. The plug fits directly into the powerlet type outlet you have. HTH
P.S. I think on my bike the wires were folded and wrapped in black tape so you may have to dig around to find it.