Pissing antifreeze from above the rear axle?! montero xls 03

So last few days noticed a few green drops, took it to dealer where they didnt spot anything (im sure they looked under engine where of course they would not spot it), then today its gushing, found where its coming from, a hose behind the rear axle pouring green liquid, anyone know what that hose is back there?

Il y a un heater core derrière, j'imagine pour le chauffage pour les passager en arrière.

Makes sense.. F@%@$%, right around the holidays too, nobody is able to book me in to fix.