If under Project selection, in the 3D view, a 3db file is selected and the mouse cursor moved over a connection point, a tooltip is displayed with its respective name and when selecting, in the dialog box Choose connection point, it is marked in red in the 3D view.

Connection point highlighted in red after selection in dialog and name in tooltip on mouseover

The same works under Settings -> Classification -> 3D view.

Connection point highlighted in red after selection in dialog and name in tooltip on mouseover