NVR with no spot monitor

I have a Northern NVR16POE as well as an old analog Nuvico DVR at a local American Legion club. Both of these machines are located upstairs in their office. Presently the Nuvico and Northern machines both have some cameras connected. The object is to migrate all cameras to the IP Northern by next year. My issue is that the Northern does not have a spot out option to play 2 cameras on a monitor downstairs in the bar (the Nuvico DVR presently does this). They want to update the 2 cameras and move to the NVR with no spot. Does anyone have any ideas on how to accomplish showing these 2 cameras on the monitor downstairs?