Retroarch + Pegasus Frontend

I’m trying to use Retroarch with pegasus frontend, but I’m having some problems. I used the command line to make the retroarch work, but with it I can only make it run one game. I do not remember how to make it run with the selected games from the frontend, could anyone help me? Here is the command line I am using.

Here is the pegasus frontend link

We don’t provide support for launchers. However, there must be some syntax that it uses to create variables. Usually something like %rom% or whatever.