You have to make and assemble the adapters. (i.e. go to dealers and buy the corresponding mating housing connectors for the Rs4 seats and the cars loom, and pins that go in them, and the crimp them to wires, pop them in the right holes in the connectors and job done)
None on the market Id have thought!
All the extra wiring is for is electric lumbar (ground and live) and remaining wires for seat heating, thats it! Not like you are wiring Engine ECU
Itll be a bit fiddly but its the only way to not splice your wires.