Here are steps you would need to do to populate file name and file title fields with source file path:
1. There is the source folder with the following content:
2. During job creation the following field mapping is set up:
Note: you can see what value the File path contains if you have Data Analysis mode ON:
3. After migration is completed, the file properties look as follows:
The file name has the "-" symbol replacing special symbols as "\" or ":". The reason of doing this is that the symbols are prohibited in file title in SharePoint.