Multisite SSL not working

I have a multisite setup called and i have many subsites called,, etc;

For ssl I have a wildcard ssl covering all subdomain based website and its configured to the virtual host
<VirtualHost *:443>
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html

We have mapped an external doman to

How do we configure an SSL for . Need help to configure ssl for a specific domain under a domain mapped multisite setup. Kindly guide. Thanks