THM Clavicula M3 MTB Spider Interface

Does anyone know what kind of interface is used on these cranks? It looks very similar to Specialized centerlock. Trying to see if a Power2max powermeter can be mounted to these cranks. They offer Rotor, Specialized, Easton, Sram, and I think Praxis.

I found a WW thread that mentions it but ultimately inconclusive https://weightweenies.starbike.com/forum/viewtopic.php?t=148989