Interesting chart..You have mars conjunct AC intercepted...
As for the tsquare I feel this has to do with you career bc it involves the 6th house and the MC but it also involves the 3rd/9th houses so a number of possibilities come up in my head:
1. You will succeed career wise abroad, do you live in another country different from the one you were born in??
2. Your profession will involve teaching the less fortunate both of these things can manifest in different ways...
Since your jupiter rules your 5th and lands in your fifth house and is part of a grand trine that involves your sun/mercury near your MC which is also part of the tsquare I think kids will probably part of your career choice.
I am thinking perhaps working teaching autistic children or working providing therapy to autistic children..for some reason this popped into my head but that is one way of this manifesting itself.
It could also be working with kids who are needy or less fortunate abroad; perhaps missionary work.
Or it could be you teaching kids who are developmentally delayed or kids with special needs.
Or you can own your own daycare or own your pre school....
Transits that touch that intercepted mars conjunct AC will push you towards your calling and taking initiative towards your goals connected to the tsquare.