SMP3.0 http authentication with headers

Hi experts,

I am trying to use HTTP/HTTPS Authentication as Authentication Providers, however the URL have to be requested with  a header. Let me show in the Firefox RESTED client.

Screenshot 1: request with header, I got 200

Screenshot 2: request without header, I got 403.

Now I begin to configure the HTTP/HTTPS Authentication:

If I use this URL, then when I register to SMP,  I will get the same 403 error in SMP logs.That's reasonable , because I didn't put any headers in the configuration

So I am trying to send the header(X-SUP-DOMAIN, please don't focus on this header name, just in my case, I must use this header)  to the  server. So  I did configuration below follow the quick help:

Then I tried register to SMP again,  I got this error in SMP logs, No client values to send to the server.

Now  my question is : in my case, I have to send some header to authentication provide, how should I send this header to requested URL? How to use the Client HTTP Values To Send and Send Client HTTP Values As?

Because I can't find any related documents talking about the HTTP Authentication with headers. Please help me.

Thanks,

Billy