Gunslinger Stratos Local Multiplayer?

[Hydreigon]

Many Round 1 locations have at least two of these machines "linked" (I do see ethernet cables from the machines connected to a hub). All of the machines (at least near my R1 location which has four of them) seem to do their own thing and won't communicate with nearby GS machines. Is there some sort of special process in test mode to get linked GS machines to sync so local multiplayer is possible or is local multiplayer not possible and requires a NESCIA card. This behavior applies when connected to the internet and idk if local multiplayer is possible if not connected to the internet. I'm not an operator (at Round 1) but to see four GS machines that won't do local multiplayer is a bit of a waste of space imo.