The 3 colours of wires and connectors (inputs & outputs) represents the 3 data types:
GREEN = number data (numbers or numArrays)
PINK = point data (points or pointArrays)
YELLOW = objects (curves, surfaces or bReps)
So Curve & polyline nodes inputs are PINK and hence point arrays (minimum length of 2)
How to extract "Points" from the OBJToArray Point for see them ?
No yet result with the "Extract"...so try that but...
ConvertPts don't want to show them! (orange square! :(