Adjusting mechanical door lock?

Has anyone ever had to adjust the operation of the mechanical door lock on their GenII Prius? I couldn't find it discussed in other threads. I had a dead 12v battery and couldn't open the driver's door with the mechanical key. It would turn to almost 90 degrees in both directions the door wouldn't unlock. I called AAA to gain access and replaced the battery but still can't open the door with the mechanical key. I noticed there is an access hole on the edge of the door near the lock cylinder and there seems to be both a bolt and a lever inside (attached picture). I assume they do something regarding the lock but am not sure what.