How to make nginx ssl with port 8443 - ssl

Question

I'm trying to add ssl on 8443 in nginx (For some reason I cannot use 443). The .conf file is as
server {
listen 9081;
server_name myserver.someserver.in;
return 302 https://$server_name$request_uri;
# include conf.d/gzip.conf;
location / {
root /home/some/path;
try_files $uri $uri/ /index.html =404;
}
}
server {
# SSL configuration
listen 8443 ssl;
include snippets/self-signed.conf;
include snippets/ssl-params.conf;
}
But, after hitting myserver.someserver.in:9081, I'm getting error citing SSL_ERROR_RX_RECORD_TOO_LONG. Am I missing something?
UPDATE -
Content of included files are:
file -> self-signed.conf
ssl_certificate /etc/ssl/certs/nginx-selfsigned.crt;
ssl_certificate_key /etc/ssl/private/nginx-selfsigned.key;
file -> ssl-params.conf
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
ssl_ecdh_curve secp384r1;
ssl_session_cache shared:SSL:10m;
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;
add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
ssl_dhparam /etc/ssl/certs/dhparam.pem;