I have launchbox in a custom made arcade cabinet with 2 joysticks always plugged in.  I also have 2 USB ports in the front, so that I can plug in another controller if it is better for certain games.  My desire is that when plugging in a controller into one of the USB ports (i.e. XBOX controller), that it would become player #1, and the 2 other joysticks would then become players #2 and #3.  I cannot figure out how to do this in retroarch.  You can find articles that suggest this is possible, but the articles seem to be for a version of RetroArch that I don't have because the options mentioned in RetroArch don't even exist in my version.  This is a little bit of a bummer, because these arcades previously were running Linux with RetroPie.  The custom-made version of RetroArch that comes with RetroPie has this feature out of the box and I used it frequently.  Is there anyway to do this with LaunchBox?