Connecting the second one. K-Line

Hello everyone,

I'm currently building my second ISO9141 adapter (inspired by Mark Neugebauer's suggestion) for the ingenious VAG COM (and here's another thank you to Uwe).

This adapter should, of course, also be able to read data from the second K-line (and, as before, from the KL line). Unfortunately, I couldn't find any answers to this question in the forum.

Therefore, two questions:

@Uwe, @Rainer, @Mark Neugebauer, @all other electronics specialists.

a.) Will the data be sent to the 1st K-Line and the 2nd K-Line (excluding... Are the L-Line signals being transmitted separately?
b.) Are the received data from the 1st K-Line and the 2nd K-Line 'ORed' together and both outputted to RXD, or are the data from the 2nd K-Line passed on to, for example, CTS?

Otherwise, keep up the good work!
P.S. I will, of course, gladly provide the schematics for my adapter once it is finished and tested.

It would naturally be easier if you got a kit from the online store, as it includes everything, including a proper OBD2 connector .