kudob61.8tquatrro

so i brought my car into a european specialist mechanic and they done turbo timers on b6 a4's b4 and also they bypassed the stock alarm system b4 too...but once they open up my dash they noticed that 2002 1.8t the wiring is different from 2003? has neone experienced this? i know the mechanic is not lying about it but they changed the wiring system on 2003's from the 2002's? If neone has a turbo timer hooked up to a 2003 1.8t can they some sort explain or show a diagram of the wiring on it...only thing why they couldn't do it cuz they dunno what wire is what cuz they searched online and could not find ne diagrams on the 2003 a4's...well if neone can help plz do so thank u