For those that like a little DIY the electrical kit is provided to connect your battery to the dash outlet. It is rated for 5 Amps and should not be used for a heavier current without the advice of a professional auto electrician.
This component set includes: -
48"/1.2M 16AWG Cable
24"/600mm Harness Cover
Inline Fuse Holder with 5A Fuse
Zip Ties/Shrink Wrap and Crimp Connectors