This photo of the basic Arriva Cordless unit (upside down) shows the earbuds, wires and base. Open the clip on your 2nd generation Apple iPod Shuffle and lower it down on the base and plug. Closing the Shuffle's clip holds it firmly on the base.
Here's the Arriva Cordless Headphones unit with the iPod Shuffle installed. Plug the Arriva Cordless Headphones earbuds into your ears, drape the wires over your ears, and suspend the Shuffle at the back of your head. The space between the headphone unit and Shuffle is closed with tape not to secure the Shuffle but to prevent damaging sweat from invading the space between the headphone unit and Shuffle.