[V.A.C.]

yup it's probably a coolant line. Easiest way to test them is to give em a squeeze. If they feel really stiff the line is probably okay, if it gives when you squeeze it, replace that line it will fail shortly. You should be able to see if any of the lines are cracked, fluid dripping from them. What color was the fluid that leaked out? Coolant lines are really cheap and very easy to replace, unless it's a lower rad hoses then it might be a little tricky. Good luck!