Here is a video that shows how to setup Elgato Light Strip.
Please Note: Only cut Elgato Light Strip once! You can only use one segment, so if you decide to trim the full strip at one of the specified marks, do so after careful consideration. You cannot put cut segments back together again. See the video above for more essential information about this.
If you can't see the video above, visit: https://www.youtube.com/watch?v=w26YJuwIgaY