The 1st diagram is intended to be the "key" to the 2nd diagram, to match where the wires go/come from. The 1st diagram includes the front centre speaker.
I pulled the diagrams a while ago, for my own interest, from BMW ISTA+. You can install BMW ISTA+ 4.27.31 yourself:
https://f48.bimmerpost.com/forums/sh...9&postcount=18