I want to start a WP multisite for a client but before i do

Hi guys,

I want to start a WP multisite for a client but before i do i just have 1 or 2 questions im looking to get an answer for. I know that i can use domain mapping to allow users to map their domain and along with prosites to limit users from accessing premium or free content and i can used a wildcard ssl to allow all subdomains to be accessible through https. But my main concern is that, how would i go about allowing a map domain eg. Mysite.com to be accessible through https. What do i need to do to get that etc..

Thanks in advanced.