New Audi a4 Owner - Headrest Question

[gholder_a4]

ok, new to the forum and picking up my new audi a4 avant ultra sport 150 ps manual on the 1st march.

I would like to fit headrest dvd players (although toying with the idea of some cheap tablets)....now power supply is the issue

these are the ones im interested in....they have wires for 12v supply.

NAVISKAUTO New Ultra Thin 10.1" DVD Player with Screen: Amazon.co.uk: Electronics (http://amzn.eu/au1ej3C)

Now my question......does anyone know how I can wire them to the 12v lighter/supply in the car....I am happy to wire stuff and take apart things....

[porty]

There is a cigarette lighter-type 12v power socket at the rear of the central console for use by rear seat passengers which is only powered when the ignition is on. I'm no electrician, but I assume that you could tap into this power source somehow?