How to orient a .unv file using 3-Node Alignment in ANSYS Workbench script?

Hello everyone,
I'm using ANSYS Workbench scripting for the MAC Calculator (NVH toolkit) and encountering an issue with the command that orients the experimental model.
Does anyone know how to orient a .unv file using 3-node alignment using script?
here is my script :
Create MAC Calculator
MAC_analysis = DataModel.GetObjectById(131)
MAC_object = MAC_analysis.CreatePostObject("MACTreeObject","NVHToolkit")
Import experimental result
filepath='F:\Yacine\DATA.unv'
MAC_object.Properties['File2Options/File'].Value = filepath
Orient UNV file
temp_prop = MAC_object.Properties['File2Options/OrientBy']
temp_prop.Value = r'3 Node Alignment'
MAC_object.Properties['File2Options/OrientBy/NodePair1'].Value=['Named Selection','NODE1',194] #not working
Tolerance
temp_prop = MAC_object.Properties['MACOPT_RSTMACOptions/Tolerance']
temp_prop.Value = r'Yes'
Solve
MAC_object.Import()
Thank you for any guidance!