SSIS Condition that include two connections/data bases

In a SSIS package , I need some sort of condition that include two connections. The simplified problem is: A simple CSV import to SQL Server, DB1, table 1( col1, col2 ). I need to populate table 1 > col2 = '1' if col1 is found in another database , DB2 > table 2 ; db2 is specified as a different connection in package. and table 1 > col2 = '2' if col1 is not found in the lookup database. any guidance is appreciated, ta