SAT Math 2 help??

I am a junior currently in Alg 2 (I know its low but my middle school did not offer anything higher than pre-alg so I started late). I have no knowledge of pre-calc whatsoever and I plan to study it over the summer break to take AP Calc senior year. I also want to take Math 2 subject test after summer. Will studying pre-calc help prepare for SAT math more so than studying SAT math for AP calc??

Yes, the highest level of math needed for the math subject test is pre-calc