There is a Denodo documentation available for this topic in detail from here.
[Denodo Distributed File System Custom Wrapper - User Manual](https://community.denodo.com/docs/html/document/denodoconnects/8.0/en/Denodo%20Distributed%20File%20System%20Custom%20Wrapper%20-%20User%20Manual)
You can refer to the (H)DFSDelimitedTextFileWrapper section of the document for more detail on other attributes and its descriptions such as Delete after reading, Separator, etc.
I also had tried with creating a CSV type data source in Denodo to multiple csv files on AWS S3 directly as well and one of demo can be found from youtube at below URL if you are interested.
Hope this helps.