What is the purpose of the opening in the back of my watch box? All WOLF watch boxes have a charge port in the back for smart watch charging. Updated on December 16, 2020 Tagged: Charge portChargingOpening watch boxSmart Watchwhat is the opening in the back of my box?What is the purpose of the opening in the back of my watch box? Related Articles Autumn 2021 Sale FAQ Is the warranty on a WOLF item transferable? Why do I need a watch winder? Which WOLF is best for me? How do you use the Dynamic Cuff? How does an automatic watch work?