[AA7KN]

Ihello to all. I have a 1996 explorer 4.0l V6. Under the a/c heaterm blower are 3 hard line vacuum lines. One goes to the round vacuum resivour, one goes to the heater control valve and the 3rd one goes where ? I am replacing all the brittle and dry rotted vacuum lines and I can't fine where this 3rd line goes. I can only access these lines after removing the tire and inner fender liner. If anyone know where this goes I sure could use the help. Thank you in advance for reading my post.