Ok this one is easy request
Hot In ——|/|——- ballast— lamp pin one—
-
Though cathode lamp pin 2 ——| |——-
Lamp pin 3 going though cathode pin 4 ——- Nutural
|/| is normally close it breaks the circuit
| | Normaly open push to prheat cathode
And start lamp
I think this is actually two switches in one press in and hold is like the normal starter release it the lamp lights fully press again it cuts power
The old and very fried ballast was connected to the white neutral (which is wrong) I used my old and trusty Advance LC-25-TP
I know the traditional preheat setup but since both ends are on the same side I'm having trouble visualizing this sorry