Within the Controller Service Configuration section, there is the Properties subsection. The keys and values in this section are the property names and values for the service. For example the StandardSSLContextService would have a section like this:

Properties:
 Keystore Filename: /tmp/localhost/keystore.jks
 Keystore Password: keystorePassword
 Keystore Type: JKS
 SSL Protocol: TLS
 Truststore Filename: /tmp/truststore.jks
 Truststore Password: truststorePassword
 Truststore Type: JKS
 key-password: keyPassword