Need Help / Connecting Points

Hey there,

attached you can find three PNG files. I have those random points and I want to draw polylines through them (01.PNG). About 6-8 points are on the same Z-Plane and 15-17 point are on the same Y-Plane. The result should be as shown in 02.PNG. I connected the points with "_CurveThroughPt". The result are 16 curves on Z-Planes and 8 Z curves on Y-Planes. Now I would like to automize this process, because I have 500 of these parts. I already tried my best as you can see in 04.PNG.

Thank you for your help