Makey_Makey casePlace your Makey_Makey on to the base and align the USB connector with the slot provided. The connectors on the base should slot into the rectangular holes on the base. Snap the end caps onto the base - these should now hold the Makey_Makey securely in place. I printed mine out with a 33% fill which seemed to work fine. Also, try and print the end caps a different colour to the base - it'll look nicer :)Lastly, big thanks to the Makey_Makey team for this canny bit of hardware.