Well, the other thread has become so cluttered with many different questions and answers and discussions, it's hard to read. It wasn't my intention, my bad 
I thought I just post this specific hardware related question on a separate topic.
If I understand your other comment, you mean someone can put a USB to USB-C cable into the connector designated to connect the two halves and that could fry the electronics somehow?
Not really worried about it, as I'm not planning to sell it and it's only meant for usage at home. Likewise, someone could just drop it on the floor and step on it, breaking it either way.
Perhaps there's some way to partially protect against it with some extra electronics, but I don't know if it would ever be a problem. For myself I could just use a different color of cable to connect the halves than the one used to connect to the PC.
I'm open to other suggestions to connect the halves, but this is the last thing I need to figure out before I can start to order some of these parts to start prototyping with actual hardware.