On the BedWarsPractice server, navigate to: plugins/BedWarsPractice and open Settings.yml



Set Practice-Proxy.Enabled to true, like in the picture above
Set Practice-Proxy.Lobby-Server-Id to your lobby server name (the practice lobby name written in BungeeCord's configuration that indicates to the practice lobby server)

Put the BedWarsPracticeProxy.jar in the plugins folder.

Start the server and let the plugin generate the configuration.
Once the server is up and running, you must stop it.

Navigate to: plugins/BedWarsPracticeProxy and open Settings.yml



Set Practice-Server-ID to your practice server name (the practice server name written in BungeeCord's configuration that indicates to the practice server)

Start the server again and enjoy this resource!