Nginx How to map Nginx http response header?

I tried several configs but seems to not work, like...

Code:

map $upstream_http_x_litespeed_cache_control $nocacheheader {
    default      0;
    no-cache   1;
    }

Code:

map $sent_http_x_litespeed_cache_control $nocacheheader {
    default      0;
    no-cache   1;
    }

Page is still cached.
What is the correct format?

My HTTP response header:

Thanks!

---

 

Thanks, but still caching the page:

 

I already read that, and tried several ways, still lost :|
Thanks.

 

Anyone want to help?
Still not able to figure out this :|