Creating New Source System Connection

[First post, so go easy on me!]

I have created a source system connection in BW QA, to an additional R3 QA client, but I am unable to assign any datasources to the new this new connection. [I know that I should have created the connection in DEV and transported through, but I need this connection for a small test, that won't be used again.]

To get round this, do I need to have my BW & R3 clients 'opened' again, then transfer the 'Application Component Hierarchy' via RSA9, then 'Replicate Datasources' in BW. If not, does anyone have any suggestions?

Thanks in advance.

Scott