Which objects to add for user role

Hello guys.

Have SCOM 2012 R2

Need to create user role for CRM admins, so they can view and edit alerts for their servers.

I choose Advanced Operators, but i'm stucked at creating group scope.

Let's say i want this user role to create rules\override  for all objects, which contains in my CRM server. What object type will i choose? Windows Computer? Or i need to add specifically all objects, connected to this server (but they are hundreds).