I'm installing a Kenwood DNX5120. So far I've ordered a mount and a antenna extender, but now I'm looking for a wiring hareness and I have no idea what to look for. Only thing I've found that seems to work is a METRA XSVI-6522 but most sites that have it, seem a bit shady to put it best. Will the METRA XSVI-6522 work with the kenwood if I have a non infinity stock stereo? Will it work with the built in GPS system and everything else. Thanks for any help!