Depending on what kind of certificate you have we have a few processes for this.
1. Do you not have an SSL and the domain name (www.domain.com) you’re using doesn’t matter? If yes, then our Streamlock Certificates that come with Engine are your best option.
2. Do you want to use a custom domain with your SSL and already purchased a new certificate? If yes, you’ll need to set up a request. We have an outline of this here.
3. Do you already own an SSL that has been issued and requested? If so, then you can import a certificate into Engine as well. (This is particularly useful for wildcard SSLs)