Issue Trying to host domain under "proxy"

[dopeboy]

so my domain test.ex.nl is pointed to server 1.1.1.1 (static ip) just nginx installed! no plesk.
and there's a simple nginx conf file

root@ded1:/nginx/sites# cat test
server {
        listen 80;
        server_name test.ex.nl;


        location / {
         proxy_pass http://whost;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection $connection_upgrade;
        }


        location /status {
         vhost_traffic_status_display;
         vhost_traffic_status_display_format html;
        }
}
root@ded1:/nginx/sites# cat /etc/nginx/nginx.conf
http {
    ....
    upstream ucs {
    server 192.168.122.15;
    }

    upstream ghub {
    server 192.168.122.101;
    }
    upstream ludaking {
    server 192.168.122.101:6666;
    }

    #PLESK SERVER IP 2.2.2.2 
    upstream whost {
    server 2.2.2.2;
    }
    ....
}

and my plesk panel is running in a server with ip 2.2.2.2 (static ip) (isn't create from my node like ucs or ghub)
so now i've add domain test.ex.nl on plesk panel but when i visit it i see default page

is needed to put any port at my upstream conf like 2.2.2.2:7080 ?! i tried but didn't work also i tried :8080 :7081 but didn't work.

can i host a domain like this or not?! i just want to know if there's a direct way not to edit vhost file for domain test.ex.nl and to run it in a different port then to forward ports from server 1.1.1.1.
just i'm searching for a direct way without touching vhost's files and to set a custom port for it :/

Thanks!