How to implement a similar nginx redirect?

Question

Nginx

Good afternoon.
It is necessary to make a redirect of this kind:
site.ru/help/en/test should redirect to site.ru/help/en/#test
in fact, you only need to add # before test, I have already considered quite a lot of options, but not one of them is correct works.

Answer 1

Thanks to all who answered, everything worked with the following redirects:
rewrite ^/help/(.*)/([^#]\w+)$ $scheme://site.ru/help/$1/#$2 permanent;
rewrite ^/help/(.*)/([^#]\w+)/$ $scheme://site.ru/help/$1/#$2 permanent;