The throttle body harness goes through the plastic housing that contains the wires, from there around the back of the intake Housing and to the computer on passenger side.
In this image you can see the plastic housing I am speaking of.
Also: I did a write up on how to take things apart to get to Valley Pan, but you can use the beginning of it to get to the throttle body. (It is really easy).
Pick and choose what to remove, DIY ->
http://www.xoutpost.com/bmw-sav-foru...-n62-4-8l.html
The only think to add to this is; you will have to do a Throttle Body Adaptation. I don't know how to do that yet.