Forgotten nodes in Elephant

 From:  Frenchy Pilou (PILOU)
11805.1 
I have some points and want make some curves or surfaces from them...
But i am some rusted about Elephant...i don't refind the good ones!

What nodes can i input here between these existing ?
here for make lines


Sure i can draw them by hand but...


and the file 3DM : https://moiscript.weebly.com/uploads/3/9/3/8/3938813/space_3d_points.3dm

EDITED: 24 Sep 2025 by PILOU