back windshield fluid on 2001 Pontiac Montana

where do u put the windshield wiper fluid for the backwindow

Asked by for the 2001 Pontiac Montana
it draws from the front reservoir,if its not pumping there could be sediment blocking the rear line.make sure the front reservoir is full and if it still doesent pump fluid to the rear unhook the rubber hose connecting to wiper then run the pump and look for fluid.