Unable to define connector for multiple backend systems in BRM

Hi,
I am on GRCFND_A V.11 and SP04
I have multiple backend systems integrated with GRC box. So far I was using one backend connector as default one for role maintenance but it is not feasible if you have to create roles in variuos backend connected systems. I know one way to do so, i can keep changing the default connectors whenever i need to create roles but that is obviously not at all the onw any one would like to go with.
So, I tried to create unique connector groups for every individul backend connectors. But the issue is, the moment i assign the backend connector to the respective connector groups, the same gets reflected to other connector groups as well. So, whenever i either add or delete some of the connectors to any connector groups it gets modified/changed from all of the connector groups.
These are the backend connectors where i have to create roles from BRM whenever needed.
These are the connector groups:
I followed to the ink: GRC AC 10 BRM: Default Connectors with Multiple Back-end R/3 Systems , which is the same as mine issue, but not able to come to the solution point.
would appreciate for your quick response.
Thanks,
Ameet

Could anyone suggest solution to the above mentioned issue please?

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