In order to install the Wake Sketch Plugin, you must first install the Wake Uploader for Mac.
Once Wake is installed, go to preferences and click Install Sketch Plugin. The plugin will automatically install, and you will then be able to upload artboards from Sketch directly to Wake.
To upload artboards from Sketch, select one or more artboards and then press Command + Shift + W.
You can also change your keyboard shortcut within Sketch by managing your plugins.