Purple part on the wiring diagram. 
 
The sensor is attached with an adhesive patch. Note that if you are only using a CoxOrb in your boat you don’t need to install a rate sensor as the built in accelerometer will give you rates automatically. The Seat Magnet can be attached to the seat using the provided cable ties, screws or double sided adhesive patch.
 
All our wiring components are fully compatible with NK wiring so can be used as replacements on existing systems.