http://www.twinturbo.net/nissa....aspx
That might help. Once you have loosened off those two 14mm locking nuts on the throttle cable bracket, you pull the cables upwards so they are no longer held in place by the bracket. Now you need to take those disc looking items on the throttle linkage attached to the plenum and push on it, as if the car were accelerating. Now you can unhook the cables from the discs.
The discs are in the middle of this picture: