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The top is the 2003 has extra connector that seem to plug into another box and bottom is 2002, they all plug to one box.
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The part of the question that I can answer is about the extra connector.
The Tiptronic cars have the transmission harness bundled together with the engine harness. There is a separate transmission module on the firewall next to the DME that the extra plug connects to on the Tiptronic cars.
Everything you need for the engine is there on the harness and the Tiptronic stuff can probably be un-bundled and cut out if you want to use that harness (not recommended).
The DME 7.2 vs DME 7.8 has been figured out by others, but I'd only be guessing.