Light the 9 standup targets to light the clock shop VUK, then hit the VUK to lock the ball. A second ball then ejects into the shooter lane and a shooter lane skill shot target (1 2 3) will flash (and display on DMD animation), if you hit the lit skill shot the ball stays below and a 3rd ball ejects for another skill shot usually to a different hole, once skill shots are finished the ball is released from the VUK and the balls shot up from under the skill shot lane to start 2 or 3 ball multiball.

If you only achieve 2 ball multiball you can increase to 3 by hitting the VUK again then shooting the windcoaster quickly. The ball is diverted back to the shooter lane for a 3 ball skill shot.

This gameplay video at 2:07 demonstrates successful start of 3-ball multiball

- multiball animation/bangerang callout
- first skill shot lights (lower lights on skill shot ramp), in this case 1 or 2 hits 2
- second skill shot lights, in this case 3, hits 3
- 10m awarded, 3 ball multiball starts, ball released from VUK through skull, ball(s) under skill shot kicked to top of pf

Conveniently at 7:02 misses the first skill shot so 2-ball multiball starts

Yes it does sound like the lower skill shot switch, I guess the balls are kicked out later as part of the machine search.

If not already definitely get this machine on chads Hook 5 code.