Where in admin panel to turn on SSL?
Using Jamroom
It's not something you just turn on - you have to:
1) install the key and certificates (both domain and chain) onto your server, and ensure the domain has been configured in Apache correctly for SSL.
2) You need to modify the data/config/config.php file and update the URL to be SSL (if you want everything to be on SSL)
3) You need to add the proper redirect mod_rewrite rules to your .htaccess file so access to port 80 is redirected to port 443.
Your hosting provider should assist you with this.
Hope this helps!