Just a quick look at what i have done to add rca's to the rear of the oem radio. i only added front rca's rear can be added the same way. i will add more details once i get a chance. but for now i had to cut a small piece of plastic at the back of the dash were the radio sits in the pocket to make room for the rca's only the positive leads on the radio output are used so fir me front left front right and the rca ground gets grounded to the radio chassis do not use the speakers negative leads it will result in a cancellation of the signal solder the positive to the center pin on the rca out Jack then solder a small piece of wire to the rca out ring and strip back wire jack to bare copper then ground to radio chassis hope this helps some people i dont like using Loc's they dirty up the sound in my opinion