Use the Applied Moment subnode to apply a moment at the center of rotation. The moment that you specify is interpreted in the selected coordinate system.
The Coordinate system list contains all applicable coordinate systems in the model. Select a
Coordinate system for specifying the directions of the moment.
If you are performing a linear buckling analysis with a combination of live and dead loads, select the Treat as dead load check box to indicate that the load contributions from this node are constant. The default is that a load is proportional to the load factor.
Physics tab with Rigid Connector node selected in the model tree: