Adding "Position" as Object Type in solar02 End User Roles

I am trying to add "Position" as an Object type in solar02 under tab "End User Roles"

could any expert kindly advise on how to create "Position" as an object type under "End User Roles" tab. I am wondering why position is not an option already!

because in PPOMA_CRM or PPO1 I can create a Position. All I can see are Organizational Unit, Job, User but no position! Why is this missing? Looking forward for help.

I already checked this post http://scn.sap.com/people/andreas.diebold/blog/2007/02/13/extend-sap-solution-manager-to-manage-new-object-types#comment-462894 but maybe I am missing out this requirement