He did not say genuine. "NEW - GLX-PCB-Main Main PCB Printed Circuit Board for Hayward AquaLogic AquaPlus"
That's fraud because the part number is a Hayward part number.
A different manufacturer cannot use the same part numbers.
They have to identify the manufacturer.
Their label is intentionally misleading.
In any case, I don't know if it goes through a voltage regulator or not.
I don't know why it would need a voltage regulator.
Can you show the voltage regulator?
You can probably just skip the orange wires and connect the yellow directly to the rectifiers where the orange wires connect.
You should install a 20 amp inline fuse in one of the yellow wires.
I would send the fake board back for a refund based on fraud and misrepresentation.
If you want to try to connect the yellow directly to the rectifiers, you do it at your own risk.
I do not know if it will work or if it is safe to do this.
I do not recommend doing it as it might have unintended unexpected problems that might damage the system or cause other damage.