If I remember correctly, the pin connector on the QMx was meant to be for hardware expansion right?
Dunno if this has been suggested before but I have a suggestion.
Maybe you could create duplicate slots to test shorter (or inflexible) cables with.
So for example if you have a cable that’s just too short or stiff to connect the type A to whatever port, you can have a “cabled extension” that is flexible and plug it through there instead.
This also would be useful if you wanted to test USB-C to USB-C cables - or that other USB interface that usually plugs into older printers and scanners.
And since we’re at it, it could also have a extension that bypasses the type-A connection and have a USB-C to test say a lightning to USB-C connector (unless of course you could already connect it to the available lightning and USB-slots and are detected automatically)