a) The two images, one above the other as put together by Ron Gerbron https://www.theothersideofmidnight.com/20210508_andrew-rons-items/#Ron_items
b) Area to be compared with a network with channels around the point named Trivium Charontis
So the underside of what I consider to be the beak like area becomes the channel named Nilosyrtis to the right of Isidio Regio and Neith Regio
d.v) I admit that earlier I wanted to connect these two areas but I suddenly decided that only the left side from this image from the cliff became the area shown below.
If we compared these two:
This would become the areas labelled as Aeria, Arabia, Dioscura and Cydonia.