Brad Sam from Thurrot – says that he believes the images to be authentic and not the work of someone with a handy 3D printer.
The alleged images show an optical audio port, two USB-A ports, ethernet, power and a single HDMI port. (The Xbox One family, for comparison, had a second HDMI port for pass-through shenanigans.) There's also an odd rectangular slot which Sams explains is for diagnostic reporting and likely won't be making an appearance on the final console. We're months away from the Xbox Series X release, so the retail version could look completely different from what is showcased here in this image though.