Looking at the hookup on the corn head itself, the lower right port is your pressure hose and the lower left port is your return hose. These are the same hoses used for reel drive on a platform.
You will also need to go into the monitor and change a setting. Go to Main>Combine>Header Setup>Reel/End Dividers. Change Reel/End Dividers configuration to Yes. The reel speed knob on the console will now control speed in manual and also ratio in auto reel to ground speed.