So what is the problem?
You have two servers:
1. WCS server
2. Web server like apache or nginx.
For example:
192.168.88.2 - WCS
192.168.88.3 - Web server
On your web server you have HTML page.
For example like Two Way Streaming: https://wcs5-eu.flashphoner.com/cli...ming/two_way_streaming/two_way_streaming.html
From this page you can set wss://192.168.88.2:8443 to connect to your WCS server.
You can even connect to our demo server: wss://wcs5-eu.flashphoner.com:8443
Websocket connectons are crossdomain.