Did you check out the exam description for the CLEP Precalculus exam on the CLEP website (http://clep.collegeboard.org)?
This description is fairly detailed on the knowledge and skill required. Here are the bigger categories: Representations of functions: symbolic, graphical and tabular (30%); Algebraic expressions, equations and inequalities (20%); Functions: concept, properties and operations (15%); Trigonometry and its applications (15%); Analytic geometry (10%); Functions as models (10%).
The description then breaks those categories down even further. If you do a google search on Precalculus and CLEP, you will find several websites that will list additional study resources. Again, you are the one studying for the SAT Math II exam, so you are the best one to compare the study material for both exams and see how they match up.