In a Bitnami LAMP stack, SSL certificates are configured in
/opt/bitnami/apache2/conf/bitnami/bitnami.conf. In that file, there are two lines containing
SSLCertificateKeyFile, which point to the certificate file and the certificate key file, respectively, as explained here.
If you install the WordPress module on top of the LAMP stack, by default, it will operate in "prefix mode". In this mode, the Apache configuration for the WordPress module is taken from
/opt/bitnami/apps/wordpress/conf/httpd-app.conf. If you configure the application to use a virtual host, it will use
/opt/bitnami/apps/wordpress/conf/httpd-vhosts.conf instead, as explained here. In this file, there's also a piece of configuration for SSL, setting the certificate and key to
Depending on whether you configured your module to use virtual hosts or not, you should modify
/opt/bitnami/apps/wordpress/conf/httpd-vhosts.conf in order to enable/disable SSL globally or per module.
Keep in mind that the certificate files must be readable by user
daemon to work with our LAMP stack.
Hope it helps.