ChromeOS

That's where applications in the Linux container will look for them. But in the Terminal app. But I'm talking about SSH connections managed by the Terminal app. In the Identity section of the connection, you can click the Import button and get a file chooser to select a private key file (like by going to Linux files, showing hidden files, and picking a file from ~/.ssh). When you do this Import it copies the file somewhere and when you open the connection it uses that copy. I'm looking for where those copies are stored, because I don't have a particular key in my ~/.ssh but I want to use it with an sshfs connection.