ok. need to know. the four wires going to left and right rear speakers. witch one is positive and witch one is ground. i am running them through a converter so i can wire up my amp and sub in my ls. tried searching but didnt find anything related to what i need to know lol. any help?

 

Rf + lt grn
rf - dk grn
lf + tan
lf - gray
rr + dk blue
rr - lt blue
lr +brown
lr - yellow