So there is the standard connectors: Then there is this unknown box - what is this an aerial amplifier: The box has there connectors coming out of it: Then it come with this loom as well aftermarket im guessing: And this is the loom from my sony stereo that i want to fit: Soooooooo, how does all this go together for my sony HU to work? What is that box? Is it necessary? Have i got everything i need here to make my HU work? Thanks for the help. Sam.