However, the ruler of Scorpio is Mars and he sends a square (which is negative) to your sun-Jupiter conjunction from a superior position. Mars is a problematic planet signifying things like: speed, overheating, conflicts, abrupt changes, anger, things spinning out of control, competition, strength, hardness, counteraction, accidents, loss and separation. Your Mars is located in the 10th house, which is a strong house. He does not derive support from being in the sign of Leo, which gives him a sort of mediocre condition. Mars’ aspecting and ruling of your sun-Jupiter can indicate different types of problems like: meeting resistance in acquiring a position or losing the one you have, going too fast and overlooking opportunities, feeling driven to prove yourself, feeling restless and edgy, being sensitive to (perceived) martial aspects of people or situations, feeling pushed into being something your are not, accidentally undermining your own success by being clumsy, inconsiderate or indignant, feeling counteracted by other people or circumstances, having to compete, experiencing inner division, (subconsciously) engaging in forms of self-sabotage. You remarked having difficulty deciding if your sun is located in the 12th house or in the 1st house. The 1st house is one of the most strong houses and the 12th house is one of the most weak. I suspect that the reason why it is hard to figure this out, is because you are feeling some sort of pressure that seems to work against you. If your sun-Jupiter conjunction would be placed in the 12th house, it would have limited power as well as be under martial pressure. If this conjunction would be located in the 1st house, it would have its own force to try to meet the martial challenges.
Your sun, Jupiter and the 10th house – as societal indicators – are all connected through this sun-Jupiter conjunction, which is aspected and ruled by Mars in the 10th house. My take on this would be that this conjunction is located in your 1st house, meaning it is something of central importance in your life, as well as a source of power, which at the same time is being heavily contested by Mars. How does all of this add up? My guess would be that your conjunction of the sun, Jupiter and the north node (which adds strength) slightly outweighs Mars’ impact, but it might be the case this will remain a lasting tension in your life, because both forces seem somewhat evenly matched. At certain times you should be able to push through the resistance, make things happen and succeed in your endeavors, but there will probably be some martial risks and dangers lingering in the background, every now and then coming back to test your Jupiterian spirit.