Hi,
Your data source is not LO Data source.
So there is no concept of setup tables.
Your data source may pulls data directly from source/base tables.
So you can activate your dats source form source system RSA5 and do the required modifications at RSA6. Later you can do test run for your data source at RSA3(source side).
While testing if there is no data then ask source team to maintain some data(at Dev system) and later check it.
While testing data source at RSA3, if you get any error please let us know.
Thanks