This is a system I came up with in order to utilize the top of my Xbox Series X for storing various accessories. It is modular, and the STEP is included so you can make your own mounts utilizing this system. Each Xbox Series X bracket can take up to 4 accessory slots. Those accessory slots can scale vertically, as the bracket is quite secure against the Xbox.
PartsXbox Series X Bracket
This part fits over the top of the Xbox and is where the accessory plates connect.
You have the option to install M3 heat-set inserts in order to secure the accessory plates with M3x8 screw, or use the included "pins" to secure the accessory plates without the need to heat-set inserts
Accessory plates
The plates that attach to the Xbox Series X Bracket.
As mentioned above, these can be secured either with M3x8 screws, or the "pins" model
Included accessory plates
Generic Base Plate - Blank plate used to fill up unused accessory spots
Xbox Series X Headphone Stand
Xbox Series X Controller Stand
The step is included so that you can design your own accessory plates. Let me know if you have any questions!