So, you all need to copy the config file and the required private keys(files), which you want to use on your system to the c:\users\<userName>\.ssh\
directory. You can look up the the scheme how the demo two private keys are imported, and you may import as many as you want like that.
$ ssh-keygen -t rsa -b 4096 -C "[email protected]"
Step1: ^^ ABOVE COMMAND.
//Use your own email address, this creates in your current working directory, when you do it with terminal.
//Also, remeber to name the file(by default it takes it as id_rsa), otherwise you'll need to rename it manually when you would need to save in the .ssh directory.
$ cat yourFile.pub | clip
Step2: ^^ABOVE COMMAND WILL COPY TO CLIPBOARD DIRECTLY.
Copy the content of .pub file(C:\Users\chetan.ssh\something.pub) and paste it in Github>Settings>Ssh and Cpg keys>New Ssh key.