Starting the game you should first put the ball in the flashing 2x saucer for bonus multiplier.
Subsequent bonus multipliers to 5x are achieved through the drop target sets starting with the 3x bank on the right.
To start 3 ball multiball FIRST step unlight the stand-up targets on the right. Lock will blink at left lower saucer when achieved.
Multiball 2nd step: unlight stand-ups on upper bank across from the left saucer. Put ball in upper saucer, plunge the 3rd ball to start.