How to create Data Tables names so it can be concatenated regardless any specific file names

[#1]

Hello,

I'm making a workflow but having one issue now, how should I modify below JSL so that JMP can concatenate all excel files from this folder regardless the actual file names?  

Can anyone please advise? Thanks!

--------------------------------------------------

Data Table( "S3_PM5" ) << Concatenate(
Data Table( "R3_PM2" ),
Data Table( "Q1_PM5" ),
Data Table( "KTC_Beta_BL_PM4" ),
Output Table( "Untitled 19.jmp" ),
Create source column
)

[#2]

Have you tried using Multiple File Import?

[#3]

Yes but my question is at step#2 Concatenate tables.

What kind of JSL should I write here in order to have JMP concatenate all files into one? the total files number and each file name can be random.

[#4]

So the files look different as Multiple File Import wasn't able to concatenate them?