CD Changer connection help

[johnx14]

i need help in getting a cd changer i was given, connected to the car. its a sony xplod CDX-T70MX and ive a seat aura cd head unit, wired for a changer. ive connected the changer to the wires from the head unit for a changer, and it says ''no changer''

what connecting part will i prob need?

 

[The MoffMeister]

some may not be conmpatible with the head unit your best off changing that to

 

[johnx14]

my bro used it in a leon , he has forgot what connector he used. ive been on sites but am getting confused over which bit it is, in one a harness seems to be what i need, in others it a different plug etc. costs vary from £10 lead to £60 harness....