Depends on other mechanical layout. Scimitar and Spartan have the driver placed offset on the left, as per the pic in post #11 above.
The driver of the Challenger II tank is placed dead-center beneath the mantlet for the main gun when it's in the forward position, allowing ammunition storage tubs on either side of him to be accessed from the turret.
The British *Wolf* Land Rover scout vehicles and most light trucks have the driver's wheel on the righthand side, though, with the Landies having a Gimpy machinegun mounting for the lefthand-seat gunner.
