I searched and couldn't find anything about this so which is positive and neg wire in the rear deck speakers?

get a voltometer and test.

tried that didn't work, Got it to work tho so no biggie

usually the negative is black striped

most likely they do not have stripes i have never seen them on rear deck speakers on cavys

Ok i found my notes for ya the Left Rear is (Brown positive) (yellow negative) Right Rear (Dark blue Positive) (Light blue negative)

WHy on earth did they use such @!#$ up colours? I had this problem the other day but just guessed right luckily.