How to insert custom location code in NGINX (trying to remove .php .html extensions)

Hi I’m a total newbie at editing Nginx file configs, would be awesome if someone could help me out by either pointing out where I have to insert the code in my below config or insert it for me and post the full edited config code!

I’m trying to rename urls for example https://domain.tld/contact.php (and .html) to https://domain.tld/contact

CODE I NEED TO INSERT

location / {
    try_files $uri $uri.html $uri/ @extensionless-php;
    index index.html index.htm index.php;
}

location ~ \.php$ {
    try_files $uri =404;
}

location @extensionless-php {
    rewrite ^(.*)$ $1.php last;
}

My http nginx config file

# Redirect www and non-www http to non-www https
server {
    listen IP:80;
    server_name www.domain.com domain.com;
    return 301 https://domain.com$request_uri;
}
server {
    listen      IP:80;
    server_name domain.com www.domain.com;
    root        /home/admin/web/domain.com/public_html;
    index       index.php index.html index.htm;
    access_log  /var/log/nginx/domains/domain.com.log combined;
    access_log  /var/log/nginx/domains/domain.com.bytes bytes;
    error_log   /var/log/nginx/domains/domain.com.error.log error;

    location / {

        location ~* ^.+\.(jpeg|jpg|png|gif|bmp|ico|svg|css|js)$ {
            expires     max;
        }

        location ~ [^/]\.php(/|$) {
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            if (!-f $document_root$fastcgi_script_name) {
                return  404;
            }

            fastcgi_pass    127.0.0.1:9002;
            fastcgi_index   index.php;
            include         /etc/nginx/fastcgi_params;
        }
    }

    error_page  403 /error/404.html;
    error_page  404 /error/404.html;
    error_page  500 502 503 504 /error/50x.html;

    location /error/ {
        alias   /home/user/web/domain.com/document_errors/;
    }

    location ~* "/\.(htaccess|htpasswd)$" {
        deny    all;
        return  404;
    }

    location /vstats/ {
        alias   /home/user/web/domain.com/stats/;
        include /home/user/conf/web/domain.com.auth*;
    }

    include     /etc/nginx/conf.d/phpmyadmin.inc*;
    include     /etc/nginx/conf.d/phppgadmin.inc*;
    include     /etc/nginx/conf.d/webmail.inc*;

    include     /home/user/conf/web/nginx.domain.com.conf*;
}

Little question, since I am using VESTACP which creates two config files (nginx.conf for http and snginx.conf for https) which one do I edit? I’m redirecting everything to https non www.