c.d player audio connecter ?

When you fitted your sony c.d player did you use the wires direct from the back of factory fitted c.d player or did you have to get an additional audio connecter ? i have bought a dvd/c.d/mp3 player for my nissan almera sve (2004) but am having trouble fitting it. halfords have supplied 2 audio connecters... nissan prmera and a nissan micra one but both of theses dont fit :(