Let’s look at important things here –
Mars - Mars represents our will power, courage, ability to take actions, aggressive nature, anger, our fighting ability, brother, male friends, a boy friend for a girl, a soldier, an athlete and real estate etc.
Shatabhishak Nakshatra - It is a nakshatra related with healing and health care. It is related with serving humanity or higher cause. Please check this link for more info on Shatabhishak Nakshatra - https://www.astrosaxena.com/shatanaksh.
Aquarius - As Shatabhishak is part of Aquarius sign, Aquarius and things represented by Aquarius are also important here. Aquarius is 11th sign of zodiac belt, hence it signifies the things and energy related with 11th house of horoscope, such as Gains, Desires, Hopes and Wishes, Large Organisations, Network Circles etc. Besides this, Aquarius also represents Scientific Thinking & Research, Uplifting the Society, Higher Goals & Rewards for all. Aquarius is made of another set of 2 and half Nakshatra, i.e. Dhanishtha, Satabhisha and Purva-Bhadrapada. Aquarius Lord is Saturn & Rahu.
Saturn & Rahu - As Saturn rules Capricorn & Aquarius and Rahu co-rules Aquarius & also rules Shatabhishak, their position and dignity is important to know about the overall functioning of any planet in Shatabhisha/Aquarius.
Houses Involved – Also, we can’t afford to forget the houses involved as a planet can be ruling different houses and sitting in different house for every person as per ascendant and planet’s position. To know overall affect, we have to consider the houses involved as those areas of life are being impacted.
Interpretation of Mars in Shatabhishak Nakshatra – Now, Mars energy and actions are going in the domain of Shatabhishak which is related with healing and helping people. As Shatabhishak is connected with healing, helping and serving people, their efforts and actions will go into such kind of activities but as per Mars nature. As Mars represents tools and equipment, these people can either be seen as surgeons or people who are in work related with medical equipment or after-care services. As Mars also represents technology and Shatabhishak is also nakshatra of new age technology, this position can also make someone very good with technology related field. At the same time, we have to keep in mind that Mars is in Saturn ruled sign which will give results after much delay, hard work and perseverance etc. There can be great amount of frustration within person too as his efforts may not give results for long period of time. Initially, he may not even have right sense of direction for his actions. If Mars is relationship oriented planet then it will bring its own challenges in relationship where person can face frustration and aggression. Overall, a good position for medical and technical field.
Role of Saturn & Rahu - Also, Saturn-Rahu placement is important to guide Mars in right direction, being Aquarius & Shatabhishak lords.
Other Factors – And of course, we need to consider conjunction, aspects, house lordship, house position and dashas etc to know the exact results of Mars in Shatabhishak. So, we always need to take a holistic view of chart rather than just 1 planetary position.
Conclusion – So, this is how I see Mars in Shatabhishak can work in a chart.
Hope this helps. Please post any comment or query you may have.