Been doing some further digging ( inc. lots of google translated russian pages
) and I've found some technical info and that there's a way to add a non front facing USB port to these units as well as a 'rear unit' aux port as well. Not for the faint hearted tho as it involves disassembling your unit and soldering new USB/AUX cables to the back of the PCB. Also this doesn't double the number of ports you can use, as its merely a piggy back off the front facing ports ie DONT PLUG IN TWO DEVICES AT ONCE as you risk borking up your headunit as well as whatever's plugged in.
Link for the USB mod is here :
Разули RCD330+ ッ. Подключение заднего USB на RCD330+ — бортжурнал Volkswagen Tiguan ッ Black Edition 2015 года на DRIVE2
Link for a teardown and other modding info (like where to pull line level audio from the unit )is here
RCD330g Plus Desay - Discussion - w3bsit3-dns.com
And to think this all started out with looking for an online copy of the manual
Media Playback specs :
Attachment 29605
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