This box for external ssl like PositiveSSL and etc.
If you want to use free SSL you can give Cloudflare a try and lets the Cloudflare handle your DNS too. Cloudflare Dashboard > SSL/TLS > Origin Server > Create Certificate > Copy Cert and Key and paste it where it belongs to.
finaly I crate manully the certificates for my domains ,
thes are based on lets encrypt
now how should I use them in my server that runing the latest version of ssl ?