How to collect NGINX configurations from different files?

Question

Nginx

Tell me, please, how can I implement the assembly of the config file?
There are configuration files, these files are included in the nginx.conf file, but they have duplicate locations, tell me how you can separate the duplicate locations into a separate file and connect them to nginx. Sample nginx.conf
configuration

...
map $host{
    ....
}

include /path/file1.conf;
include /path/file2.conf;
include /path/file3.conf;
include /path/file4.conf;

file1.conf

server {
   listen 127.0.0.1:80;
   ...
  location ... {
      ...
  }
 location ... {
      ...
  }
}

file2.conf

server {
   listen 80;
   ...
  location ... {
      ...
  }
 location ... {
      ...
  }
}

file3.conf

server {
   listen 443 ssl;
   ...
  location ... {
      ...
  }
 location ... {
      ...
  }
}