This depends on how you’ve set your embedded broker up. If your broker does not yet have a bridge Thing associated with it, then you can use the one from the example and adjust the parameters.
If you do already have a bridge Thing, and you set this up using PaperUI then I’m afraid I don’t quite know what the next step would be.
I will say this: if you intend to upgrade to OH3, the embedded broker is being removed completely. I would recommend moving to a dedicated MQTT broker such as Mosquitto to future proof yourself…
EDIT: Just realised this example doesn’t include the code for a bridge Thing. Use the one from this post for now (scroll to bridge.things).