Maybe like this? Worked for me.
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
v = UnwrapElement(IN[2])
r = UnwrapElement(IN[0])
p = UnwrapElement(IN[1]).ToXyz()
o = UnwrapElement(IN[3]).ToXyz()
n = UnwrapElement(IN[4]).ToXyz()
TransactionManager.Instance.EnsureInTransaction(doc)
e = []
e.append(doc.Create.NewSpotCoordinate(v, FamilyInstance.GetReferenceByName(r,"Center (Left/Right)"), p, o, n, p, True))
TransactionManager.Instance.TransactionTaskDone()
OUT = e