Hi Bernie,
The 2950 BC does not come from the factory pre-wired for 2nd A/C unless it is ordered. That is an option. Either your invoice from the factory should have it listed or an easy check is to pull the vent frame down and look for the wiring near the opening.
The factory does not supply wiring schematics for the units. But you can call customer service and they will help you locate wiring or with a problem if you have one.
Jim M