Hello, I have a 2001 HSE with the Alpine head unit, HK upgrade, factory sat nav and rear seat video set up. I want to upgrade the head unit for one with DVD capability. In additon to the 2 ISO connectors and aerial lead on the rear of the Alpine unit I found a three other small connectors in a row above the upper ISO and a second thin coaxial connector and cable next to the aerial - can anyone shed some light on what these connections are for?