This little piece clips on to a USB cable and holds the tiny adapter that lets you charge the Apple Pencil. Now the adapter will not get lost.
THIS MAY NOT WORK ON ALL USB CABLES. I measured the cable that I got from my 10.5 inch iPad. Even Apple USB cables have different dimensions, so for that reason, you can edit my OnShape model free of charge (if you have a free OnShape account). Otherwise, you can just view and download from the link below.
Apple_Pencil_adapter_holder-v2.stl | 1.0MB |