Based on the Foot from Ptinton (Einhell-USB1.stl) https://www.printables.com/model/402863-einhell-power-x-change-usb-qc-loader/files.
This Case is for the Modules SW3516 or SW3518.
https://www.aliexpress.com/item/1005006005888592.html?spm=a2g0o.order_list.order_list_main.41.ff135c5f79MHZb
The author marked this model as their own original creation.