How Nginx Sends reuests?

i am new to nginx and currently i am using nginx as a reverse proxy , we are using nginx to route the request to other urls , For example i have below code ,

location /test/rome/ {

   
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        #remove this line if you application does not depend
        proxy_set_header X-HttpRouter-REMOTEADDR  $remote_addr;

        proxy_pass http://test.com/1234/test2/;

So in the above config i am saying any requests comes to /test/rome should redirect the request to the proxy pas url ? Is that mean do i need to open the FW connectivity from nginx servers to the server mentioned in proxy_pas ?

Da, această configurare trimite cererile cu prefix /test/roma la adresa URL specificată în proxy_pass.

Și da, nginx de pe server trebuie să poată deschide conexiunea TCP la serverul de destinație.