Hello,
You have 2 solutions : in both cases, define your source connection strings with an expression filled by a variable value
1 / define a job with 10 steps. In each step, define the connection variables depending on your source connect string.
2 / create a table listing all your connection and their connect strings.
Use a For Each Loop Container fetching this table and getting connect string values. Inside the Container , insert your data flow that will be launched as many times as there are lines in your connection table.
JL