Yes, both are on the drivers side. The heater works just fine(with the exception of the vent door cable, which is disconnected, and visible in one of those pics), so I don't think that second plug is for the heater.
Could it possibly be something for AC? The jeep had AC when I got it, but aparantly had a leak, and the PO ran it without refrigerant, and seized the compressor. But I don't remember seeing that plug when I removed all the AC stuff.
maroon 1987 Grand Wagoneer. stock for now...