Yeah, it's like femoral or pre anal pores on many other lizards. Some individual panthers they are really noticible.
I've kept species of lizard that even have them on their feet (tribolonotus) or belly button area (painted agama).
I once read that scientists think that the waxy secretions from these pores leave markings behind when brushed against surfaces that are visible to lizard vision (lizards see color spectrum that we cannot), and perhaps they can smell them too. Marking territory. Invisible and odorless to us humans...