Thanks for the help.
Point taken, but it is only a 10" one so easily managed, but moot. The other thing is having just moved in (out in the boonies) I don't know anyone to ask to help. Also, the system does not appear to work with a cell phone. Have not found the DVR for a model number yet. Was told it is in the Attic, but there is none, so I assume he meant the ceiling crawl space.
Since writing this request I have remembered I have a small (3" or 4") LCD screen I bought for a car reversing camera and it has RCA input. I will try finding that as it also has the standard looking 12vdc input connector as the camera.
Thanks to you both.