Inlet hose. INVERTER. Cooling line that carries coolant to the hybrid inverter. Hose that attaches to the Drive Motor Inverter Radiator. Hoses carries permanent coolant, or antifreeze, throughout the engine, heater, and radiator. COOLI. Drive Motor Coolant Line. Drive Motor Radiator. Engine Coolant. Inlet. Outlet. Water. Included with: Inverter.