Screenshot of Step 3 of the Create External OS Role Wizard. 

At the top of the box is the text "Which database roles do 
you want to grant to this role?"

Below the text is an Available Roles list, which displays:
   AQ_ADMINISTRATOR_ROLE
   AQ_USER_ROLE
   CONNECT
   CTXAPP
   DBA
   DELETE CATALOG ROLE

Below the Available Roles list are Grant and Revoke buttons, 
which are both grayed out because no available role is selected.

Below the buttons is a Granted Roles list, which displays:
   AQ_USER_ROLE

At the bottom of the box are Back, Finish, Cancel, and Help buttons.