Monitor B requires the Auricula plug-in Monitor to function properly.
Place on a bus -> hardware output channel. The D/A would be connected to an amp or a pair of active monitors. WARNING: Improper use could result in LOUD signals.
This plug-in has no parameters. You should keep its GUI hidden. Be VERY hesitant, maybe even PARANOID, about bypassing this plug-in. Unattenuated (LOUD) signal could be fed to your amp/monitors.