In Bhrigu Nandi Nadi, Jupiter (Guru) is the primary Jiva Karaka (representing the living soul/self of the native), while Saturn (Shani) is the Karma Karaka (representing all professions, actions, and destiny).
Verse 2 — Shukra and Kuja Portfolios (Spouse & Energy)
शुक्रः स्त्रीकारकः धनं भार्या च सौख्यदः ।
कुजः भ्रातृकारकः भर्ता रक्तदोषो बलप्रदः ॥ २ ॥
Venus (Shukra) is the significator of wealth, spouse (wife in male charts), luxury and female lineage; Mars (Kuja) is the brother, husband in female charts, blood, vital energy, and ego.