[twvette]

Spoke with WFCO. The -R is just the latest version of the T-57 and not a separate model. Apparently the AUX connections are not needed on a 50A generator as they only have one neutral whereas some others (I believe they mentioned 70A generators) have two neutrals and this second neutral would go to the AUX connection. So, they removed the AUX connections on newer versions. Not sure why mine has a wire going to the Generator AUX connection and they suggested just moving it over to the Neutral connection. Perhaps it was just part of Keystone's standard wiring procedure to run this extra wire but really don't know. Will report back if any issues after doing this.