I will say stop overthinking about the score and just focus on putting in your best in your finals. You already did very well for your SAC, and looks like you have the potential to pull off a perfect 50 RAW.
Worrying too much about the results is just a distraction, where the time and energy is much better used to revise, and making sure you perform optimally on the day on the exam. Study like you usually do, and let the results come naturally
For me, to keep track of the score, the RAW score is one-to-one to your overall results including SAC. If your overall result is say 95%, SAC + final exam including weightage, I'd say you can expect 47-48 RAW score. It might get scaled up or down, but you can't really control that, so just focus on what you can control, making sure you bring your A+ game on the day of the exam.