When you’re missing a model, there are 2 “types” of locations that the model can be in
  • Models directory
  • Direectly in a custom nodes
Everything in models directory can be installed into storage Custom nodes can be installed directly into a machine. You can do this via the docker commands
Docker commands are those that you would write in a Dockerfile reference.
E.g. 
RUN wget -P /comfyui/custom_nodes/<dir> <download-link>