First, you need to identify the output files/logs from the product. Splunk can ingest and search any text input, regardless of format. You do not need to enter a schema into Splunk or set up a connector to interpret the files - you just need to get the data into Splunk.
Once you have identified the inputs, you might want to set up a forwarder to monitor the files and to send the data to one or more Splunk indexers.
Once the data has arrived on the indexers, you can search it, use it to build reports and dashboards, etc.
I strongly suggest that you walk through the Splunk Tutorial, which introduces most of these steps in more detail.