Fitting the wire on the Nymane Swing Arm Wall Lamp

Have a look at the wire that comes down from the box of the Nymane Swing Arm Wall Lamp. There is no hole or small gap so that the wire is able to pass through! How can it come out like shown in the photo? https://www.ikea.com/us/en/images/products/nymane-wall-lamp-with-swing-arm-led-bulb-white__0586562_PE672121_S4.JPG