HH56 wrote:
You might check the AEA drawings available in the wiring section at the PAC site.https://www.packardclub.org The generators are all shown with internal wiring and it looks to be the same for the 326 and 426. I don't find a wiring sheet for a 528 but there is one for a 1928 526/533 and if it is the same generator as the one shown on earlier models it is wired slightly different from them.

I believe Jason at AER is quite experienced with the Owen-Dyneto generators.

EDIT: Jason's website did not open for me this morning so don't know if his provider is having issues or the virus shutdown might have affected his business.