Nginx reverse proxy regex help

[blason]

Oh my bad those xxx. and sss consider those are single url. I just typed
while creating this post randomly

Here are my error.log -

2021/09/17 11:23:09 [error] 9429#9429: *1814357 peer closed connection in
SSL handshake (104: Connection reset by peer) while SSL handshaking to
upstream, client: 10.0.22.99, server: xxx.xxxx.xxx.xxx, request: "GET
/TestPage/ HTTP/1.1", upstream: "https://10.0.20.77:443/TestPage/", host:
"xx.xxx.xxx.xx"

Wondering why this is making connection to host when my proxy_pass says
https://<Host_name>

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,292405,292414#msg-292414