Scott - these connect to what Volkswagen call the "Media Device Interface" (MDI) - located in the centre console (or occasionally the glove box).
Unless you have the MDI already installed, then that will not be all you need. Unfortunately VW don't make it that easy. If your new ride has MDI - then you are laughing.
Have a read about the MDI on the interwebs - heaps of info on it (and on here to boot)
Al..
2013 MY13.5 Passat V6 Highline Wagon. Watch this space
GONE:2017 MY18 Skoda RS169 Wagon w/ Tech & Lux, 2007 VW MKV Golf GTi
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