Select a point, or a set of points, representing the source connection point for the Spring-Damper. The main intent is that you should select a single connection point, but it is also possible to select several points. If you select several points, the spring attachment location is the average value of the coordinates of the selected points. The displacement is computed as the average of the displacements in the selected points, which for a flexible body might not be the same as the actual displacement in the averaged location. The spring force is distributed over the selected points.

When Select a connection point is chosen under Source for in the parent Spring-Damper node, this subnode will automatically be generated. It cannot be added or removed manually.