unit or

I have had the the head unit out of my 05 leon 1.9 TDi SE. A brown plug and a black plug fit into the back of it (plus the aerial). Is the remaining empty socket for the CD changer and does this mean my unit is not pre-wired for the changer?

bought my dad a 6 disk changer, thought it would fit straight to the head unit on his leon, was hoping the loom/data cable would be factory installed :( not the case, just wondered if anyone knew the seat part number for these, dont fancy pulling my leon to bits just to find out. im...