Which is positive the black or white on rca jacks

[agcg7469]

Its by scosche ...2017 car audio rca jacks black and white..which one is positive or which one i plug into red and white on my car radio

 

[americanaudiophile]

If you are connecting a car head unit to an amp then, just to be consistent, I would go red RCA out to black RCA in and white to white but it actually doesn't matter so long as the correct speaker is connected to the correct speaker terminals.
It's a matter of right and left speakers getting the right and left channels.