Well, the mame driver has no hardware dipswitches declared. If the cab didn't have hardware dipswitches, mame is correct not to "let" you access the nonexistent switches. (Whether or not if the cab had hardware switches is another issue.)
Maybe you're confusing "dual screen" with "networked". One cab was two player with two screens, seats & set of controls, and you could network cabs together to get more than two players. AFAIK, networking isn't correctly emulated anyway.
In 0.129, it starts in stand alone without problems. If your prob is seeing both screens: tab, video options, screen 0 standard. You might need to exit the game and restart, but then it shows only one screen.