it was a metaphor. Saul in Omaha wouldn't open the emergency door when he was trapped because he was scared. Jimmy in Santa Fe switches things (that say "DON"T TOUCH") because he'll do whatever he wants to do. Whatever the switch led to isn't important - it's that he doesn't follow direction well as Jimmy and it shows (via the opening montage) that after the events of Breaking Bad he's scared to do anything remotely against the rules.
Yep, he doesn't work well with others and will struggle in the corporate environment.