Heated Sport Seat Swap Questions

[SirTweakAlot]

I am swapping the black interior with heated seats from my '99 540i 6spd donor car into my '99 540iT . The carpet and console are out so there's easy access to the wiring harnesses.The console switchplate on the donor has buttons for the seat heating as well as DSC and rear sunshade. The wagon that all this is going into has non-heated sport seats and just the DSC button on its console. There's one big plug for all the seat electrics on each seat. Can the wiring harnesses for the non-heated seats be modified? What exactly would I need to do to make the seat heating function work in the wagon?