Mine is installed on a 2015 Indian Roadmaster. I had it installed by the technicians at the dealership. The front camera is mounted between the front forks under the bottom fork tree. The rear camera is mounted underneath the trunk/tour pack. They installed a switch in the dash to provide an on/off power control to the unit. The DVR and GPS are installed inside the trunk. The emergency button is there as well, but I’ll likely move it outside along the seat since I’ve had occasion to want to preserve a video.
Attached are the installation photos.
DVR and GPS Mount on Trunk Lid