I imagine I can see all four henua together here: We have a central pillar (which is rotating a full circle in one day) and then we have what at first glance appears to be a 'face' with an upside down mirror image at the top. But on closer examination we find that is not so.

The one at bottom has longer 'hair' at right (as seen from us), the one at the top has longer 'hair' at left. These 'hairs' are bent to show that henua are bent. They are images of the four henua.

Which explains why they are not mirror images. The longer 'hair' at one place (time/space) implies shorter 'hair' on the opposite place. That is true whether we go vertically (latitude) or horizontally (longitude).

And I believe that Makemake is what is depicted. I have put him behind 'door' no. 71 in my catalogue.