Assigning one CCM to any one instance of a RAC DB

Looking for any R12 (12.0.*) documentation explaining how to do this: I've set up a new RAC service for batch processing -- I'd like some of my concurrent requests (all running through one Concurrent Manager) to use this RAC service. How do I tell a Concurrent Manager to use a specific RAC service? Does the Concurrent Manager have to point to a primary Application server (we also have PCP enabled), and then update the tnsnames.ora with the RAC service? I've tried that, but I still don't see how the request will be channeled through to the "batch01_svc" service.  I opened an SR for this as well -- unfortunately