I have a 2010 Tig with a Kenwood DNX 520 VBT fitted by VW, i have just purchased a Kenwood DNX 518 DAB which i hope is a straight swap, i have also purchased a dab aerial splitter as i didn't fancy taking off the "A" pillar trim, the splitter needs a power source to work where can i connect it to and what colour wire would it be, would like it to be live when the radio is live.