And just to be clear, here is what happens when you shoot each spot.
Camera: The drone/turret can no longer see you. They will continue moving, and if they are in attack state, will continue attacking. WIll not track you.
Motor: The drone/turret can no longer move. If you have only disabled the motor, be aware that the enemy can still attack you if you move in the way/get too close. If the drone falls far enough when you shoot out the motor, it can disable the rest of the parts from the fall.
Weapon: The enemy can no longer attack, however, it can still track you. It can be creepy to watch the turret following you, and annoying for the drone to continually dive bomb you, but you are "safe".
Battery: This is the most practical way to disable an enemy. All functions will be disabled.
Ammo Box (turret only): The weapon will no longer be fed bullets, HOWEVER, there is still one bullet in the chamber, so be wary of that last shot.