While I was wiring away and had the bike pulled apart so to speak I had purchased a 12v socket as a extra to fit in the rear panel of the bike.
Triumph had made a hole there for the job so why they just didn't install one is beyond me but I did it anyway.
it goes in this plastic piece
bit of loctite and waterproof terminals and nearly completed and wired into the fuze box
and finished install
yes it does work