Moves the soldier into the vehicle's turret. (Immediately, without animation).
turret path is an array of positions inside a turret, or positions inside a turret of a turret.
[0,0] means first turret of first turret.
[1,0] means second turret of first turret.
[0,1] means first turret of the second turret.
[0,2] means first turret of third turret.
[1] means second turret (without turrets in that turret).