Well, if the thing is currently speakers are wired to 4 outputs as in the mib2 entry, the only way to make them work on a higher mib2 is to slap a basic entry dataset into a unit which was not physically designed for it to output through 6 separate outputs (considering a + and a - of speaker one output), which in result this prooobably would work, probably, but it wouldn't be the OEM standard if you ask me, I'm sure most of people would prefer a proper job and have their speakers wired as per factory spec.
Let me just say, I am not an audiophile, but, I don't know what kind of a job would this be when your treble speakers are wired together with bass speakers, ain't no way Seat would just make extra wires to wire them just for fun would they!?
. Funnily enough it's the dataset that facilitates this, but as you say "no genuine dataset would alter the the pinout" aside from the genuine datasets used at the factory.
