I am curious on why you are asking this as opposed to just closing the thread (which normally happens when a post is resolved). The machine obviously shipped with its cable unplugged. I am very familiar with those connectors and that board. It is more likely for a pin to slip out of those then the whole connector coming undone. So it either reveals the level of checkouts y’all use or that a slip up happened. I am leaning to the 2nd one as being the case and the machine shipped before fully passing checkouts.
Either way, the machine shipped with that cable unplugged, which would have been an immediate red-flag when the machine would have been powered up before packing. QA is there for a reason and I agree for concern on what other checkouts did not occur on this one.