Originally Posted by
OldnGrounded
Take a look at Chris Brady's latest, which shows that the plug (like the door) moves down to disengage the guide pin. It also makes clear most of the rest of the plug installation we've been speculating about.
I think Chris misspoke; not a big deal for the pressure from the interest in the topic. The door is stopped from moving down by the top of the slot in the door guide. I think he missed that the closeup was of the other side of the door than he expected as the rest of the diagram labels are correct, showing the door moving up to disengage.