MDG Consolidation from multiple source systems

Hi Experts,

I am working in MDG on S4 HANA 1909. We have a requirement to consolidate material master from multiple systems(total 3 source systems) and create the best record in MDG.

The requirement is, we have to take specific 4 fields(4 fields) from Source system 1, another 5 specific fields(5 fields) from Source system 2 and another 7 specific fields(7 fields) from Source system 3. Can anyone tell me how to achieve this business requirement. Where is this configuration to be done in MDCIMG?

Thanks, T