Yip !! looks like you answered your own question, i bought a couple of HELLA, BMW type plugs and made up a cable so i can give the Tiger a charge now and again if its off the road for a bit. i checked first with a digital volt meter to see, A. it was live when switched off. B. to check what was POS and what was NEG. its taken me a year to even look at the socket, never thought i would ever use it. saves taking the seat off to charge. i dont think i will give it a blast from the charger, just set it on low, just in case !!
KK