Hub file targets write data, to the Log Directory, as a JSON formatted field and value pair, meaning any of the files created can be forwarded to Splunk via a Splunk Forwarder.
The filename will include the name of the Source that is being monitored followed by a creation date/time and the suffix of the file. The Splunk Forwarder will require an inputs.conf file to be configured so that it knows where the files are for forwarding and what files should be forwarded.