connecting iot gateway to openremote mqtt broker

Hi all, I am trying to get my Milesight gateway to connect to the openremote mqtt broker. I am unsure what I should put as the host as I have tried mqtt://0.0.0.0:1883 since I dont have a ssl running.
with my milesight gateway
broker address 0.0.0.0
broker port: 1883
username: intellisec:mqtt
Password: the secret that user service gives

on openremote I created the service user and selected read and write

is there something I am missing