In the menu item Connections you can create connections to different data sources and use them in Peakboard Designer.
If the Peakboard Designer is connected to the Peakboard Hub, a connection created here can be loaded in the Peakboard Designer and subsequently used in data sources. To do this, open the dialog in the Peakboard Designer menu bar under [Connections] (1).
Afterwards, all connections from the Peakboard Hub can be loaded via the button […] and [Refresh Peakboard Hub connections].
Once this is done, you can use this connection when creating a data source as described here.