I took a closer look in the files, and you messed up several things. In particular the
\inibuilds-aircraft-a350\SimObjects\Airplanes\A350\presets\inibuilds\A350-900\config\attached_objects.cfg
seems to be the file from the no-cabin version, not the right one.
In
\inibuilds-aircraft-a350\SimObjects\Airplanes\A350\attachments\inibuilds\Function_Interior_A359_Pilot\navigation_graph\navigation_graph_pilot.cfg
the position of the pilot makes no sense, it seems to be the one from the A35K.