I am using the Smart Data Manger concept in IFS Cloud, 

Navigation : Solution Manager > Data Management > Data Migration Manager > Project Basic Data 

DB link is created from IFS Cloud db to fetch data from the Source (tried IFS Apps10 and from FSM Database)

But in Project Basic Data - Under connected environment : Database link is listed only if the DB Link source is created from IFSMIG User (Tried both in IFS app10 and in FSM database)

But IFSMIG Schema is introduced only from IFS Cloud versions, not available in Apps10 and obviously not available in FSM db, so how do we connect the legacy database of Apps10 or FSM DB?

Need assistance on using Smart Data Manager for Data Migration task to fetch data from Apps10 or FSM db.

Please confirm if this approach is possible using SDM 

DATA Migration :

IFS Cloud ← Data from IFS APPS10 

or 

IFS Cloud ← Data from FSM DB