mySQL and Sickbeard Notifications

Hello,
Just changed my library to a centralized mySQL. However, when using sickbeard, couchpotato, etc. I'm not sure what to put in the notifications section. Do I put one of the the XBMC computers or do I put the IP of the mySQL Library with the port of 3306? How about the password and username? Or is this not needed any more and taken care of by the SQL database automagically?

Thanks for the help.