Reverse Proxy - need help

Hi guys!
Today i started to use OpenLiteSpeed (used nginx before).
I have successfully set/migrated my wordpress sites, but i cant set up my reverse proxy services like Webmin admin panel (runs on same host, https://127.0.01 - was on, and my other services (Synology web interface on other host, - was on

Unfortunately i can't find any working tutorial for my problem.

Hope somebody can help me. My setup: OpenLiteSpeed 1.6.4 on Ubuntu server 18.04 LTS.