Interaction

Hello, 

I am conduction a Seed-Based analysis and would like to look at an interaction between females and males and high/low scores on a behavioral measure (using a median split). The following are the second-level covariates I have created, using their scores: 

Scores_AboveMedian_Females
Scores_AboveMedian_Males
Scores_BelowMedian_Females
Scores_BelowMedian_Males

Are the covariates set up correctly, and which between-subjects contrast is appropriate for conducting this analysis? 

Thank you!