It is also possible to plug the servos in differently. I THINK mine is set up per stock Tamiya conifiguration - Throttle & Turret Rotation on left stick, Steering & Main Gun Elevation on the right

Ch 1 - RUD

Ch 2 - Throt

Ch 3 - Elev

Ch 4 - Aler

You can always switch them around if you don't like the configuration. Some guys in our club like to put steering and throttle on the same stick.