Remote service checking (backuppc)

I’m trying to check a service remotely. In this case it is BackupPC via check_backuppc (Nagios plugin)
As the backuppc service isn’t running locally the check_backuppc services complains that is couldn’t connect to BackupPC.

If I run the check_backuppc on the backuppc server I get the correct return message.

How can I run the check_backuppc command on my backuppc server from within the LibreNMS gui?

The LibreNMS-Agent is running and nrpe-ng/nagios-nrpe-server is running on the BackupPC server.