You should redirect your logs on the port 514 created on the Splunk enterprise server. Make a new index where data regarding these syslog will be saved.
Add report panels on your custom page and use same search queries we have used in out luna hsm app. You can get those queries in the code files after installation of application on your splunk enterprise.
At persent we are capturing data at TCP 7171.
For your issue there is workaround.
You can create a new port on 514 in splunk and redirect your syslog on this port. Create a new index for the data captured on this port. Create a new custom dashboard in your splunk. Add report panels into this.
Now you can use the queries we have given in our syslog to make some visual reports on syslog on your own custom page.