About this 3D model
Thats adapter for old version of Xiaomi powerbank 10 000 mAh. It can be used to keep your powerbank next to your belt, or on Meta Quest 3 head strap. I suggest to print it on the side - then it will be stronger and more elastic. Also not with PLA, but with PETG. But thast just my suggestions, you can test it with PLA as well :)