So after a quick search Ive not found anyone talking about the simplicity of fitting the OEM 12v accessory socket and the minimal cost. Forgive me if this is common knowledge but the socket costs circa £15 from and dealer. Removing the left side fairing takes 5 mins. This is plug and play. The feed socket is already available. 10 mins and £15 and you’re sorted.
There is nothing simple or easy to install this accessory socket. First you must field strip the entire front of the bike to access the readily available plug. You might get one of the side fairing off in five minutes if you've done it a couple of times before, but if this is your first time to go under covers, expect a couple of hours. You can also buy an after market plug assembly for about half the Honda price Pounds or Dollars.