The second driver had a separate entrance door at the left side of the hull. He doubled as a radio operator in the platoon commander or squadron commander vehicles, operating the short range ER29 or medium range ER26 set respectively.
The second driver had an individual entryway on the left side of the ship's hull. He doubled as a radio operator for both the platoon commander and squadron commander vehicles, using either the short-range ER29 or medium-range ER26 set depending on the vehicle.