Hi,
You don't need to create 5 metadatas. Your excel files have the same structure, so simply use one metatada and specify a variable in the excel file path.
For example: jdbc:stambia:excel://${~myfilepath}$?forceDatatypeAsString=true&...
This way, you can design only one mapping, and call it from an ExecuteDelivery action, passing the "myfilepath" value in the action's parameters.
FileWait (list excel files)
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| (bind link)
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v
ExecuteDelivery (myfilepath: :{FILE_DIR}:/:{FILE_NAME}:)
(sorry for the ASCII art, I can't do a screenshot right now
)