When it comes to attaching power to your screen, you have two options. One, you can attach plug ins to the cord that's been supplied to you. You would then just simply insert the plug in into your installed receptacle. Another option is going direct wire to a junction box. This is our preferred method as it's a cleaner and more permanent installation type. You simply take the wire ends and attach them directly to your leads within your installed junction box. There's no right or wrong here. Do what makes sense within your specific installation, but know that you have both options of a plug in or a direct wire to a junction box.