The effect of Saturn you can find in jos's section, " Azazel astrology."
The Arabic parts, in this case the luck part, are fictitious points. This is analyzed in many ways, some as "luck" expressing itself in the native's life in the areas where it is located (House, sign, any aspects etcc...), some "read" it in combination with high Arabic parts. Those who understand it as "karma" for good or evil.
If memory serves me correctly, soon the topic of "luck part," along with "lilith" will be covered by the Clergy sufficiently to fully understand their "function/reading."