TCU TurboLamik

Hello

I'm back in the turbolamic world

I built the E30 M3 S62 8HP, which drives wonderfully today.

I'm currently trying to build an E34 525IX Turbo with 8HP45 Xdrive.

Unfortunately I don't understand how the xdrive controller is controlled. There is a circuit diagram in the help area, but I cannot locate the lower connector from the Picture.

Gearbox is from F30

Can anyone explain, how to Connect?

Thanks

The lower connector is a ECU master can2hbridge.