Proprietary text display on a POS terminal

I have bought second hand Oracle Micros Workstation 6, as I needed a touch terminal. I am now running Linux on it and it works fine. However, I could not help but notice that it has a rear end text display. I have taken it apart and it looks as proprietary as it goes i.e. the LCD itself is pretty standard, but its board has Oracle Micros all over it. It also has non-standard plug.

I know it is a very long shot, as the unit was supposed to work only in Windows and most likely than not the rear display would run only with proprietary Windows drivers, but maybe, just maybe, there is a chance to access it somehow from Linux? Just a pointer in a general direction would be great...

I have run dmesg, but nothing interesting shows up. I have no idea whether it is USB, serial or anything else - the unit has a ton of various USB and serial connections for accessories, which does not help either.

https://redd.it/1t6f2si
@r_linux