Here is how I'm running the new drivers side switch harness I made (the big long harness sticking up in the pic). I'm trying to strike a balance between keeping things close to the factory wiring plan but also easy for me to access in the future (I don't trust my own work lol) if anything needs fixed. Rather then running the switch harness up to the dash area I decided to run it down by the side of the seat. I have it in a protective loom so I think it should be fine.
The battery power for the seat motors will be taken from the drivers fuse box as per the factory plan. Ignition switched power for the climate switches will also be taken from there as per factory plan.