Which is the correct way to cull idle kernels and notebook?

Working now. Please disregard. Added TerminalManager to the exising singleuser helm chart MappingKernelManager config. Timeout and interval values are really low for testing.

singleuser:
  extraFiles:
      mountPath: /etc/jupyter/jupyter_notebook_config.json
      data:
        TerminalManager:
          cull_inactive_timeout: 30
          cull_interval: 60
        MappingKernelManager:
          cull_idle_timeout: 30
          cull_interval: 60
          cull_connected: true
          cull_busy: false