Is the Safari have a 30 Amp shore power cable? If so, the switch probably enables and disables the second a/c unit. In some rigs, the second a/c could be run via the genset, but not via shore power. Another possibility is that it shifts power between a washer/dryer [or a large microwave] and the second a/c. In the mid-90's it was not unusual for those appliances to share one power circuit, but the circuit could not handle both appliances simultaneously. The switch controlled which one received power. We had such a switch in our 1996 Southwind, even though it did not actually have a washer/dryer installed. The coach was wired for the washer, so it had the power sharing switch.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL