Put local file into remote, but have local file selected from latest-modified folder.

Hello!
I have been having trouble figuring this out.
I use a custom python script to create backups of my .jar files I build, with the folder names being dd-mm-yyyy-hh-mm-ss, where the first 'm's are month and the second are minutes.
I want to integrate semi-automatic file uploading into my workflow, but I do not know how to get the file NimoriaChar.jar from inside the latest-modified folder in the backups directory.

If this is not something that is supported yet, I'll suggest an implementation:
Placeholders (essentially local-to-line variables that are set using a - parameter)
Make placeholders accept input from -latest (so that we can use the placeholder in the middle of a file path to dynamically select directories).

Thanks in advance.

Consider starting with this PowerShell code:
https://winscp.net/eng/docs/script_download_most_recent_file#powershell
And adjust it for your needs (selecting latest directory, not the latest file).