NodeRed RIO source location

I have some custom node that I would like to try and manually insert into the Rio palette. Is the file structure accessible or locked behind a docker? I do have ssh enabled.

Yes. Its very accessible. We have many customers that have done just what you are looking to do.

sudo su
Enter your shell password.
cd /home/dev/.node-red
Install your custom node.

Awesome, thanks for the help!