The following information comes from Benno (PA3FBX) on modifying the Minitiouner-S for a 2nd transport output. Thanks Benno!
Minitiouner- S from the French REF ham community has like many other Minitiouner versions just 1 USB output to send the transport stream to the software on the PC.
Now Tom ZR6TG made a Open Tuner software for windows to accommodate the 2nd TS channel witch can be found in the Tuner. To use this 2nd transport stream you need a second USB connection.
For this the BATC published in 2019 already a piece of hardware published in CQTV issue 264, Page 17.
Below you can find the schematic. PCB’s can be ordered from the BATC.
It connects to a Minitiouner V2 of which the part of the schematics is here:
This results in a pinout to the topside of the Minitiouner S: