Securing EPM System using SSL does not SSL-enable Essbase.
The only setting that affects an Essbase instance that is deployed with SSL-enabled EPM System is the JDBC connection setting stored in the Shared Services Registry. If EPM System web components are configured to use a secure JDBC connection to communicate with the Foundation Services database, the Shared Services Registry contains a secure JDBC connection string. In this scenario, manually install the root CA certificate used by Essbase on the database server.
See your database documentation for information on SSL-enabling the database server and client.