You can imagine that it is for Mount the cable to an equipment or a device that need a stable connections, right?
The next query is why it needs to be a dual Panel Mount?
Unfortunately, there is not a good enough reason, just to repeat the 1st reason, stable connection.
It is a USB 3.0 cable!
It can be used as a USB Adapter. Indeed, it is much more useful than an adapter!
Why? It is flexible and longer.