That's an optimate connector to charge the battery, so it will give 12v. USB is 5v so there won't be an adapter lead, you'll need some kind of converter. You'll be better off wiring something like this in place instead: http://www.ebay.co.uk/itm/DIY-Motorc...-/171738824959
I'd rather die peacefully in my sleep like my Grandfather, than screaming in terror like his passengers.- Jim Harkins