How do I wire an car stereo to an equalizer

How do I wire an eclipse ''CD3403'' car stereo to an pyramid 903g equalizer?

the car stereo seemingly controls four speakers right from the get go. two front speakers, two back speakers. '' eight wires''.

now, the EQ ''not hooked up'' has the same amount of out wires to speakers as the radio. so I understand how to connect those wires.

where i am getting lost at is. it's from the car radio to the EQ.

the EQ only has four input wires.they are the two green and two gray wires. '' the right and left inputs''.

which four of the car stereo ''out'' wires do I use to connect to the EQ input wires? frount R/L'S, or the back R/L'S ?