I haven't busted into my steering column yet so I don't have good information for you.
But at 1:46 in this video
https://www.youtube.com/watch?v=uqvR6sf91nI there is a black something that might be your first nameless part.
Look at the blur of the dude's finger to the purple spot. Go straight up the silver metal part, past the bolt on the right, to the circular metal part with slots at the edge. Just on top of that slotted circular metal part is a black plastic thing.
Could that the the edge view of your part in the first picture?