Help with installing alpine cva 1003

trying to insall alpine cva 1003 in my 95 supra. i spliced all the wires into the old harness. everything works but the aux portion. i have it  hooked up to a ps2 but i cant bypass that picture safety junk. i dont know what to hook up. i know the yellow blue wire is a parking brake wire but where do i go from there. there is also a yellowblack wire coming out of the actual deck aswell. the yellow blue wire comes out of the harness. can anyone help. thanks

the yellow/black wire goes to the foot brake + wire. the brake wire should be YELLOW /GREENSoundFX

thanks for the quick response. the parking brake wire is actually yellow and blue for some reason. what did you mean brake +wire in your response. thanks