How to configure Proxy_Pass in Nginx (scheme inside)?

Question

Nginx

Hello.
How to proxy a web service in Nginx , excluding the /admin/

directory. If I configure it this way, it doesn’t work (because the link to pages and content changes):

location /adminka-1 {
    proxy_pass http://192.168.1.1:8080/admin/;
    proxy_http_version 1.1;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
}

We need a way that would process all VM2 dependencies in its web server, and through VM1 simply give content or somehow rewrite addresses.
And if so, then it works well, but I need through the address /adminka-1/

location /adminka-1 {
    proxy_pass http://192.168.1.1:8080/admin/;
    proxy_http_version 1.1;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
}

Please suggest an implementation, thanks.