I am trying to add a sub to my Focus 08 and am using the Ford DAB unit so have to use an RCA converter which connects to the rear speakers and converts them into RCA leads. Question is, what colour wires should i be attaching the wires too as the Haynes manual is confusing the hell outta me.

i also need to connect the remote wire and I want to connect to a switched feed sowhich colour wire do i connect to? Haynes says yellow but no yellow found