Using the great tutorials here I successfully implemented ssl certificates for a few sites on my multisite serverpilot wordpress droplet. But how to add further certificates? I have generated new certificate such that I now have a folders under /etc/letsencrypt/live called bell-computing.com (with the already working certificates) and paulmarshall.com (with the new certificate i want to add).

I have a single conf file, nginx-sp.ssl.conf, in /etc/nginx-sp/ but not sure how or even if I edit it.

Below are the contents of this file
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server {
listen 443 ssl http2;
listen [::]:443 ssl http2;
server_name bell-computing.com www.bell-computing.com;

ssl on;

# letsencrypt certificates
ssl_certificate      /etc/letsencrypt/live/bell-computing.com/fullchain.pem;
ssl_certificate_key  /etc/letsencrypt/live/bell-computing.com/privkey.pem;

    #SSL Optimization
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:20m;
ssl_session_tickets off;

    # modern configuration
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

    ssl_prefer_server_ciphers on;


    ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK'; 

    # OCSP stapling 
    ssl_stapling on; 
    ssl_stapling_verify on; 

    # verify chain of trust of OCSP response 
    ssl_trusted_certificate /etc/letsencrypt/live/bell-computing.com/chain.pem;

    #root directory and logfiles 
    root /srv/users/serverpilot/apps/wordpress/wordpress_nginx/public; 

    access_log /srv/users/serverpilot/log/wordpress/wordpress_nginx.access.log main; 
    error_log /srv/users/serverpilot/log/wordpress/wordpress_nginx.error.log; 

    #proxyset 
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-SSL on; 
    proxy_set_header X-Forwarded-Proto $scheme; 

    #includes 
    include /etc/nginx-sp/vhosts.d/wordpress.d/*.nonssl_conf; 
    include /etc/nginx-sp/vhosts.d/wordpress.d/*.conf; 

}