I suspect the images on the tiwanaku statues are ‘Ometecuhtli’.
Quote source: https://gnosticteachings.org/glossary/o/2683-ometecuhtli.html
(Aztec; Ome, “duality” and Tecuhtli, “Lord”) The Lord of Duality. This is seen as the Androgynous nature of the Spirit. He is represented as being joined with his spouse Omecihuatl (see entry by that name). Ometecuhtli-Omecihuatl is the Aztec Osiris-Isis, Joseph-Mary, Shiva-Shakti, or Samantabahdra-Samantabahdri. This aspect of the Spirit is seen Kabbalistically within Daath, where divine creativity resides. The conjunction of Ometecuhtli-Omecihuatl is called Ometeotl, the one androgynous spirit.
The dwelling place of Ometeotl is the Omeyocan. The children of Ometecuhtli-Omecihuatl are the four aspects of the Cosmic Christ: Tezcatlipoca, Huitzilopochtli, Quetzalcoatl, and Xipetotec. See Omeyocan, Tezcatlipoca.
These might well be the 4 directions.
further interesting Parallels are there on the female aspect with Egypt, representations of Wadjet, as dual snake headed women which in turn is the later female aspect Medusa and Minoan snake godess.
The sundisk with two snakes, is not just a random image. It is the same concept as Viracocha (sungod) holding two snakes or, horus on top of Wadjet in hatshepsut temple, also a snake next to stairs. Wadjet head just has disapeared as can be seen from steles at same temple.