A factory 3rd remote valve handle would be located behind the other two, as would the flow control knob. I can say with reasonable certainty that any remote you have installed that is controlled where the 3 point handle would be is NOT factory installed. The service manual makes no mention of such a valve. I suspect it's aftermarket.
See attached pic from 9700 literature. A factory 3rd remote would be installed in the empty slot between the red and white levers. The flow control would be behind the console.