If a 3db file is selected in the project selection [Project selection] and the mouse cursor is moved over a connection point in the 3D view, a tooltip with the corresponding name appears and when a connection point is selected in the Select connection point [Choose connection point] dialog box, it is highlighted 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