On 2016-06-20 09:57, Dan B wrote:
  i had a vaxstation 3100 with that type of connector
(15 pins,) and
 came with another cable where you could plug at the other end any MMJ
 keyboard (and a 10 pins round plug mouse, but in your case, you plug
 directly the mouse to the box,) the monitor (on mine) was a 15 pin
 like the other two, "male," the cable (15 pins female) has only 3 bnc
 connectors, when you find a cable select on the monitor sync on green,
 and plug the three in the R, G, and B, and ignore the rest
 has been a long time ago ... hope it helps ... 
Nitpick: The keyboard connector is not an MMJ. The keyboard have a plain 
4-pin modular plug.
(MMJ stands for modified modular plug (or jack), and is a 6-pin modular 
plug, with the lock tab offset from the center.)
	Johnny