It is likely an AT style keyboard connector. This adapter will connect to a standard PS2 keyboard.
The monitor has a socket on the side for an external keyboard. This socket is about 1/2" dia and has 5 pins with a notch at the top. Doesn't look like a PS2, it's a bit older. Any idea what kind of connector this is and where to get a keyboard that will plug into it?
Thanks! Glad to know I don't need to run around looking for an antique keyboard.