You can install this plugin with the cordova CLI and the Git URL of the repository

Install the SFTP plugin executing the following command in the console (located in your cordova project directory):

cordova plugin add https://github.com/sdkcarlos/cordova-ourcodeworld-sftpplugin.git

Remember that you need an active android platform, this plugin only is available on android. Then in your document a global variable will be accesible with OurCodeWorldSFTP.