I'm not sure about the Williams 4-6-0 specifically. But it's not a good idea to mix and match tenders on any modern electronics-equipped loco, unless you know for sure that they are wired the same way. Many of the connectors have several pins: AC, DC, sound, etc., which are not interchangeable. If you "zap" a motor or circuit board it could amount to an expensive repair (assuming the parts are still available.) Look before you leap on this one!