Connect two buttkicker gamer 2?

[eho0730]

How do I connect these two together? I have two different 5.1 soundcards and using simvibe

 

[Black_rat]

Connect one to the green socket and the other to the black socket on one sound card, then in extension mode work out whether they are pedals/steering/seat or shifter.

https://simxperience.com/Portals/0/Files/SimVibe/SimVibe Setup Guide.pdf