Some tugs got two driver positions to make it easier to push and tow an aircraft without having to disconnect and reposition the tug.
When I worked as an Engineer, I also towed aircraft from the apron to the maintenance facility on the other side of the airport. I only used the rear drivers position when I was reversing an aircraft into the hangar. When pushing back an aircraft (before towing) on the main apron I would do this from the forward drivers cab and just look over my shoulder with the cab raised.
On our tugs we could select all the different steering modes from the rear station.