DAB retro fit for cars with the cd500 and 600

[zzattack]

I've mostly figured it out. Pinout of A12 X1 is:

Code:

pin/wire thickness/id/descr.
3 0.35 YE 5169 Mid Speed GMLAN Serial Data (+)
4 0.75 RD/VT 3140 Battery Positive Voltage
5 0.35 BARE 1573 Front Audio Drain Wire
6 0.35 BN/WH 367 Remote Radio Left Audio Signal
7 0.35 BN/BK 372 Remote Radio Audio (-)
8 0.35 D-GN/WH 368 Remote Radio Right Audio Signal (1)
9 0.35 GY 388 Remote Radio Right Audio Signal (2)
12 0.35 WH 5170 Mid Speed GMLAN Serial Data (-)
13 0.75 BK 1750 Ground

According to the schematic we can grab pins 5-9 from the big connector on the radio.
A pair for of power wires for pins 4/13 shouldn't be too hard to come by.
X84 is mentioned in the schematic as 'data link connector' so I'm pretty sure this fills the remaining pins 3 and 12, just gotta figure out where I can find this connector. I'd rather not splice these wires.

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X84 will be the OBD2 connector I suppose. I'll make the cable and request a VCI, hope that works out