Nav unit's MID input

[blkxer]

Curious, does anyone know if the stock 16:9 nav head unit has an MID input, or where it's getting it's MID data input from?

I removed my stock 16:9 nav head unit (process of replacing with a Dynavin) and there were 2 harnesses that I unplugged (1 blue and 1 white color, if I recall correctly). Are either one of these the MID harness? And if so, does anyone know if it is compatible to connect to a stock MID unit (used in the non nav)?