by travelingjack » Sun Apr 08, 2012 6:19 pm
They would need to directly contact you with the password. Unless you have already been in contact with them or they posted the pw on the board they probably already have their full group of owners and do not need anymore. If they said they need new owners in a thread you should state your interest in the thread and pm them.
As LMB said, private leagues are either keeper leagues, theme leagues, or leagues made up of a group who already know each other and are not recruiting anyone else.