The first Acewell I installed had a black/white wire that was a switched hot wire. That in conjunction with the blue charge light wire everything worked fine.
On the 75 /6 I used the diagram someone here shared. On this model t does not have the black/white wire and it has a single black wire that goes into the headlight bucket and it not used.
Now I see why folks were having a hard time with the charge light.
Back to the drawing board.