Good advice Steve. That did the trick.
For some reason the LEGACY PowerMaster user's manuals aren't accessible through the search engine on lionelsupport.com, but they are stored on the site. Google easily found the 360's manual, although it was quite far down the search results list.
Here are the links, thanks to Google:
1.) LEGACY PowerMaster (6-37146)
https://www.lionelsupport.com/...EGACYPowerMaster.pdf
2.) LEGACY PowerMaster 360 (6-82883)
https://www.lionelsupport.com/...CY360WPowerMaste.pdf
Thanks again,
Mike