In this case, you must either import a certificate and private key for your search appliance to use, or create a new certificate in the Admin Console, which you can then export so that the web servers can be given the new certificate to trust.
Enable the search appliance to crawl web servers that protect content with client SSL authentication.Configure certificate use for HTTPS under Administration > SSL Settings.In this case, you must import a certificate and private key for your search appliance to use, or create a new one in the Admin Console.