I was looking at the manual trying to figure out how you can do all those settings with just two buttons, but it pretty much says but the wire one in that front hole.
I'm also wondering why it has a password to protect the settings. If I ever get one, do undesirable people commonly break into people's homes and businesses and change someone's soldering temp settings. Whats this world coming to. :-)
But seriously this doesn't look like its meant to be a shared tool like in a production environment.