Extract all of the contents of the ZIP file that was sent by your SSL provides to you and upload them to your server. The extracted contents will typically be named: yourDomainName.crt and yourDomainName.ca-bundle
Move all of the certificate related files to their appropriate directories. Move the Private Key that was generated earlier to the private.key directory, which is typically found in /etc/ssl/. This must be a directory which only Apache can access.
In the VirtualHost section of the file please add these directives if they do not exist. It is best to comment out what is already there and add the below entries.