Nginx, how to change link address via location, rewrite, alias?

Question

Nginx

There is a server on centos 6 + nginx + php-fpm
On the server there is a site on the engine, in which plugins are located in a folder like:
https://site.com/plugins/plugin_name/folder/plugin.php
You need to remove the url part to make this page and other plugin pages opened at
https://site.com/plugin_name/plugin.php
but without transferring the folder itself.

I read a lot of information about configuring Nginx but nothing works.
So, the Nginx file (nginx.conf) is located on the server in the
/etc/nginx folder.
At the moment, settings have been made that prohibit loading the site by IP

http {
server {
listen ip: 80 default_server;
listen ip:443 default_server;
server_name_;
return 444;
}
}

Next, in the same server section, I wrote
location /plugin_name {
alias /home/admin/web/site.com/public_html/plugins/plugin_name/folder;
}
Then, of course, I restarted Nginx and php-fpm, but nothing works.

I also tried this design, it also does not work
location /plugin_name {
rewrite ^/.* http://$server_name/plugins/plugin_name/folder permanent;
}

I ask for help from knowledgeable people how to solve the problem.