See the red arrows. They point to the RIGHT ORBIT. See the yellow circle. That is where the switch is sticking up through the playfield.
Be sure it moves up and down freely and is centered in the slot in the playfield it travels in. And not stuck down.
Under the playfield you can loosen the screws holding the bracket to the underside to turn left or right if needed.
Test in Tests - Switches - Matrixed.
If a ball doesn't trigger it. Turn the game off. See the switch picture - black arrows point to where you bend it a tiny bit. That is the arm of the switch. I'd remove it from the playfield to make adjusting easier, if needed. A tweak or two should do it.
LTG : )
Disclaimer : Not being with jjp anymore I can't provide and under the playfield picture.
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