How to configure a Log4j2 Socket Appender with a TCP-SSL Appender?

I am planning to configure a Log4j2 Socket Appender with a TCP-SSL Appender. Here is the configuration I see in Log4j2 website. In this config, what do the Keystore and TrustStore files contain? I don't have these files. I want to send my logs to Splunk TCP port. Do I need to create truststore.jks with SSL certs from my Splunk server so that my server trusts Splunk? What is log4j2-keystore.jks, and where can I download it? Do I need a KeyStore file? What should go in it? Does Splunk need a corresponding public key or trusted certs? Thanks, Sanjay