Some clarity required re connecting to a local MQTT server

[baldfox]

Hi guys. Great software here, been having a play, been a longterm user of hardhill.

Quick question, am already using MQTT via home-assistant, and have a broker instance running successfully already, but it's not clear to me how I could be connected to that using these nodes. I was expecting to plug in IP:port and user/pass, but am faced with hostname and api instead.

Can someone shed some light on this please. I read through the docs a few times, but it's not sticking!
Ultimately would like to be able to stay 100% local, if that's even possible etc.

cheers