I've recently bought an arcade cabinet, I'm not sure which model it is an which type of monitor it have. I've already ordered a J-pac from Ultimarc to interface my cabinet with a PC, but I'm not sure about the RGB cables of my monitor. apparently the RGB cables are already connected to the JAMMA, but I see these cables from the foto not connected to anything. does anyone have a clue what cables are those? should I connect them somewhere? or should leave them as they are?