You need a unique ip + port for each secure (virtual) host. So what you are trying to do is not possible. You'll either have to get another ip address for it or run it on a different port.
Once you do have a unique ip + port combination for a virtual host then you can add the following lines for it to get the right certificate:
<VirtualHost 192.168.10.1:443>
DocumentRoot /home/web
ServerName
www.mysite.com
SSLEngine on
SSLCertificateFile /etc/httpd/conf/ssl.crt/server.crt
SSLCertificateKeyFile /etc/httpd/conf/ssl.key/server.key
SSLCACertificateFile /etc/httpd/conf/ssl.crt/ca-bundle.crt
</VirtualHost>