Kenwood KRC-2001

Question

Hi, I have a kenwood KRC-2001 old shaft style cassette radio..On the back of this radio is a DIN plug with 5 little plugs in it..My question is, "Is this a CD Changer output or a equilizer loop? Some of the older Kenwoods were known to come with either or, but I cant find any type of answer on the internet..Any help you have would be appreciated..Thanks..Mario