The OBD splitter cable connects to your car’s OBD port, and makes two OBD ports out of one.
NexCruise uses one of these, and the other one stays spare for any other device or your Car’s sevice centre.
This cable is useful if:
a) You wish to keep your OBD port available for other devices even after installing the NexCruise.
b) There is too little space in your car for the OBD connector that comes with NexCruise.
c) You wish to extend the access to OBD port of your car.