How do i connect to websocket URL from website?

i'm trying to get the update values from website, i manage to connect but i cant get the values, i dont know if i'm doing anything wrong.

this is what i'm trying to do, maybe this url is not complete, but i dont know how to get the full URL. when i try to conect i dont recieve anything, i read the coments i will try to send something to this websocket

webSocket webSocket messages

EDIT: this is the website:

you need click in this button to show the entry hall

const WebSocket = require('ws')

const ws = new WebSocket('wss://')
ws.onmessage = (event) =>{
ws.onerror = (erro)=>{

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