Thanks my friend, a lot of useful stuff. I am also looking into the cluster's pinouts (We are working on a Polo, but at the same time this will give some inspiration to the retrofits on the T6 I am sure) We found 2 groups of can cables must be needed, one is for the drive CAN, the other is the display CAN but we have to try the pinouts.
Also we have flashed our 090 BCMs all to 1S0937090M_0780 which is the max BCM version (7H0 and 7E0 can be flashed to it but must be done on the car)
I have the file but it seems impossible to be uploaded here in the comments' section.
I see, the 2q1 is the TRW steering column. And I read from Drive2, where the MrCollayder and HackR have researched into the ACC functions at the same time MrCollayder worked on the lane assist (but he changed the PQ25 platform to PQ35 halfway)
I can know that 2QD will surely work with lane assist as in China we have cars with this steering column working with lane assist already on MQB Boras, and on PQ Santanas also Openpilot makes the steering wheel work itself.
Ahhhh... last question:
How did you mount the steering column 2Q1909144t? You just switched the upper column or together with the bottom racks as well? Thanks! I want photos if possible!