what do I need to do with CB once I have the SSL set up on the website ?
Nothing as by default it should work perfectly fine when navigating to the HTTPS of your site. Just ensure $live_site in configuration.php is blank. You can also force HTTPS registration and login by editing your CB login module and adjusting the "HTTPS (encrypted) login, register and lost password" parameter as needed.
p.s. do you have searchable user-guides for members online?
Don't understand the question. We have a fully manual within the Advanced downloads section if that's what you're asking.