Multiple SAP system datasources in UM.

Hi all!

I want to use two different SAP systems as datasources for my EP6 SP12. Is it possible without CUA?

In the configuration editor I have found areas ume.r3.connection.001., ume.r3.connection.002 and ume.r3.connection.003.* in addition with ume.r3.connection.master.* area.

Can I use this areas for additional SAP systems or portal can use only one SAP system as datasource?

Thanks in advance for any suggestions.