I used one of these http://www.ebay.co.uk/itm/12V-Female-Car-Cigar-Cigarette-Lighter-Socket-Plug-Connector-Plug-Cable-Black-/301355327036?hash=item462a2d5e3c:g:dYAAAOSw6EhUP0zd and a couple of piggyback connectors tapped into the cigarette lighter cables Perfect