Yes, that's the board I need.
No, I have a single screen. But in reviewing previous old nlg posts (gold nuggets in old posts for sure!), I found someone added this board, ran a second generic monitor to the PCB plug on the backplane, and jumpedna pin (p21???) To fake comms feedback.
If I got this to work, I'd be looking to add a 10.1" LCD to the player tracking area that's currently got a blank cover to it. Theres probably way more to this, but I know it all starts with that expansion board since outback jack has 9 proms.
Any leads are appreciated. Can buy/trade stuff for it.