Script to upload files without the associated subfolders

I want to upload all files contained within the subfolders (C:\Subintest\112233 and C:\Subintest\445566), but I don't want to upload the actual subfolders. I tested the following for .jpg's, but the subfolders also uploaded:

There's no simple solution for this.
If you have only two folders, why doesn't upload the contained files individually?

If you actually have many folders, you need way more complicated script.

One way would be to enumerate the folder in a batch file and generate WinSCP script with one put command for each folder.

Or use a script like this (which is for download):
https://winscp.net/eng/docs/script_download_files_to_same_folder
Similar question: https://winscp.net/forum/viewtopic.php?t=26674