4.6 liter, The small water line on radiator..

So I have to take the alternator out to be able to repair that water line. Idk what Cadillac was thinking when these models came out. Battery under back seat, and these water lines around the alternator. So is this alternator water cooled. If so why can I not find anything on google about this Cadillac year and engine size. And thanks for the quick response....