Question about Fractal North

The only cables you will find here are the extension to plug the USB ports Aux input and the power button onto the MB.

No cables are included in the scope of delivery of the empty housing. All cabling is included with the desired installation components, e.g. graphics card, drive(s), power supply unit, etc. Once all the desired elements have been installed, there are usually numerous connecting and assembly components left over.
NB. By the way, the case looks very good and has a very "high-quality" finish.