You don't need to go to Taiwan to get confusing wiring diagrams.
I had a Sterling truck (new), the diagram in the owner's manual
did not match the truck, wires not even in the truck.
The diagram pasted on the inside of the panel cover was the same.
Go over to the dealer's shop, enter the serial number of the truck to call
up the build specs, same results.
Oh, no longer have that unit.