Agree with Julie.
On mine the female insulator is half blue/half clear and links to the Br/B wire.
Often you will find a solid coloured wire with the little coloured band as you describe; this sometime means the band colour is the trace, but can also mean, in my experience if the wire is black, that the band is the main wire colour. I have seen this on indicator wiring where the wire is black with, say, an orange band.
