Instruction #2 tells you where to place the file.

1. Please download the file. (Link removed).
2. Move the file to [Microsoft Flight Simulator X Root Folder]SimObjects\Airplanes\CS_B727-100\panel folder. Press 'Yes' when asked to replace the file.

Example: I would to paste it into this folder here:- E:\Flight Simulator X\SimObjects\Airplanes\CS_B727-100\panel

Hope this helps

Mark