Jupiter rules two signs : Sagittarius and Pisces.
As per the Kaal purush kundali where the ascendant is Aries , Jupiter rules houses 9 and 12.
Ascendants and houses ruled by jupiter are mentioned below :
Ascendant : Aries.
Houses ruled by Jupiter : H-9 , H-12.
Ascendant : Taurus.
Houses ruled by Jupiter : H-8 , H-11.
Ascendant : Gemini.
Houses ruled by Jupiter : H-7 , H-10.
Ascendant : Cancer.
Houses ruled by Jupiter : H-6 , H-9.
Ascendant : Leo.
Houses ruled by Jupiter : H-5 , H-8.
Ascendant : Virgo.
Houses ruled by Jupiter : H-4 , H-7.
Ascendant : Libra.
Houses ruled by Jupiter : H-3 , H-6.
Ascendant : Scorpio.
Houses ruled by Jupiter : H-2 , H-5.
Ascendant : Sagittarius.
Houses ruled by Jupiter : H-1 , H-4.
Ascendant : Capricorn.
Houses ruled by Jupiter : H-12 , H-3.
Ascendant : Aquarius.
Houses ruled by Jupiter : H-11 , H-2.
Ascendant : Pisces.
Houses ruled by Jupiter : H-10 , H-1.
Check the houses jupiter rules as per your ascendant and where the planet jupiter is placed in your birth chart and read about those houses ,planet jupiter and try to relate those houses and planet jupiter with each other and that's how you check how transits is playing out in your birth chart.
Points to remember :
If you are not going through the jupiter mahadasha , antardasha , prayantardasha then this transit will come and go and nothing will happen.
Ashatakvraga points of the houses which jupiter rules and where jupiter is placed will say how much affect transit will bring for the native.