So after some further checks with precious help from @Tech
I found out it's not the same harness. The harness for the LIN new lights is much cheaper ($84 instead of $212) which indicates there are probably just a few wires heading to the lights compared to the older one.
That leaves with option 2, which is to take the 12V standard signal, get it into a board like Arduino and output the LIN command.
The only way to do this would be to have the circuit board where all the harnesses connect to (central module) in order to feed the LIN data line to all lights simultaneously. This is quite involved. I've seen it done on Mercedes where they sell a box to be able to plus and play the new lights, but this is a complex project.
I have bought a LIN logger and some other tools to act as master and control my light, little by little I'll show my progress.