The next panel shows the client's Username and Password if the method used requires entry by the user. If not, it is all handled behind the scenes.
You may choose from the following registration methods:
Entered By User - Allows user to select Username and Password
Random - Generates a username / password including optional prefix.
Sequential - Generates sequential username / password including optional prefix.
Email Address - Prompts use to enter email address as key and generates random or sequential password
Predefined on Server - User will be prompted to enter an existing Username and Password which must exist on the server at registration time.
Your text should be presented to best explain the options you have established for the new user.