On drain, it should move clockwise 15 positions (five at a time), fire the hole kicker, then reset to zero position.
On my Bank Shot, the ball resting in the outhole closes the Ball Return switch, which activates the Bonus Score relay (Q). “Q” activates the Motor so the bonus unit will increment to its highest position (fifteen), activate the Ball Return relay (O), and then reset to the zero position. “O” kicks the ball out to the shooter lane.