Don't kick yourself too hard.....you now will never forget to plug in for generator power again
I got rid of my auto transfer switch (actually switches) after they failed and left me w/o power
Made and installed a 'manual' transfer switch.
I have 2 50A receptacles on my 5vr.
One up front and one at rear
Front one is add on for generator that is in back of my truck
Hooked up generator, fired it up...........nothing AC inside 5vr worked.
Spent the next 20 minutes troubleshooting when GF asked...."Did you flip sources? We were using rear plug last time"
I'm the one that did the install!