How do I add an appended custom node group?

[The3DNut]

Ordinarily in Cycles, when I go to the Add Menu>Groups in the Node Editor, I would find any custom node groups that I appended to the scene. I saved a custom V-Ray node group and appended it to my V-Ray for Blender scene, but I don't see anyway to find it in order to add it to the Node Editor. What am I missing?