ION upgrade

Waiting for pricing to upgrade my ION. Have two wings as well which I realize need to be upgraded since they have the old usb ports. Once I get pricing I can decide new ION xe or upgrade. Either way I know wings need upgrade to use them.

So question: If an ION and the wings are upgraded do they have to be connected by cable ONLY or can they still hard connect together without using cabling? If by cable can they still be hard connected to keep them as one whole unit just for support purposes?

This has everything to do with being able to still use the very expensive large custom road case I have. Not being able to hard connect will mean my console and two wings will no longer fit; too wide.