Newb Question for NGINX.conf

So I need to add the following code to the Nginx configuration file

# START Nginx Rewrites for Rank Math Sitemaps
 rewrite ^/sitemap_index.xml$ /index.php?sitemap=1 last;
 rewrite ^/([^/]+?)-sitemap([0-9]+)?.xml$ /index.php?sitemap=$1&sitemap_n=$2 last;
 # END Nginx Rewrites for Rank Math Sitemaps

I first made /home/{myuser}/nginx/{mysite}

I then went in a made a sitemap.conf with the following code above. Would I need to go into my nginx.conf file and call it in like

http { include /home/myuser/nginx/mysite/sitemap.conf

OR did I do this incorrectly from the getgo?