Compatible with the “Stream Dock” from AliExpress
https://www.aliexpress.com/item/1005007043463144.html?spm=a2g0o.productlist.main.1.53ccp0GOp0GO10&algo_pvid=2923da8c-b29f-45f4-91a4-8854e236e633&algo_exp_id=2923da8c-b29f-45f4-91a4-8854e236e633-0&pdp_npi=4%40dis%21AUD%21278.76%2165.81%21%21%211326.80%21313.24%21%40210324a717192053516687740e6af3%2112000039204141439%21sea%21AU%212491665143%21AC&curPageLogUid=ChQx4uYyBLPq&utparam-url=scene%3Asearch%7Cquery_from%3A
You need 2 20mm m8 bolts and tnuts, right angle usb c adapter or correct orientation cable.
The author marked this model as their own original creation.