It's under the dashboard, basically above your right foot when it's on the accelerator pedal. If you have an auto, the tranny controller is separate, and that's under the dash behind the glove box.
For future reference, the chapter forums are intended for discussing chapter business and local/regional business and trail rides, not for tech questions. You'll find you get a much broader and faster response posting tech questions on the appropriate tech forum. This question belongs on the OEM Tech board.
Cheers.