Re: .htaccess deny access not working

After lots of testing, this seems to work but I would like to know if this is the most efficient solution:

…
location / {

#### MY NEW RULE ###
location ~ /(my_files/uploads/files|dir1|dir2) {
#deny all;
#return 404;
proxy_pass http://192.168.1.5:8181;
include proxy.inc;
}
#### MY NEW RULE ###

location ~.*\.(3gp|gif|jpg|jpeg|png|ico|wmv|avi|asf|asx|mpg|mpeg|mp4|pls|mp3|mid|wav|swf|flv|html|htm|txt|js|css|exe|zip|tar|rar|gz|tgz|bz2|uha|7z|doc|docx|xls|xlsx|pdf|iso|woff|ttf|svg|eot|sh)$ {
root /home/<userAccount>/<site.tld>;
expires max;
try_files $uri @backend;
}

error_page 405 = @backend;
error_page 500 = @custom;
add_header X-Cache "HIT from Backend";
add_header Strict-Transport-Security "max-age=31536000";
add_header X-Content-Type-Options nosniff;
proxy_pass http://192.168.1.5:8181;
include proxy.inc;
}
…

Should I add/remove anything (other than the comments) to the new rule?
All that I'm trying to do is bypass that nginx static files rule for specific directories that rely on .htacces files.