Set the settings (if they have them) for overlay you want to use and then click the link for it. It will open the URL you need for OBS.
Copy that URL, create a new Browser Source in OBS, and paste it in.
In the same user panel, toggle Direct Message On Event. This prevents spam in log discord channel.
To test, click the Test Overlay - Add Fake Data button a few times. This will add fake sinks/events to the overlays, but will not add logs to your ship.
Once you're happy, click Clear Overlay Cache to reset the overlays to zero.
Overlays have a 24 hour cache and will clear automatically after that time.
When using the logger, events will automatically update the overlays in real time.