Cadillac Repair: 1994 Seville STS air not coming out of dash vents, seville sts, heater hoses

Question
Hi,I replaced the heater core. Ever since, air blows only from defrost. I know there is a vacuum leak, I can see two hoses, joined together by a tee, left disconnected. I understand there is a port on or near the firewall this line is supposed to go to but I can't find the port. I think maybe I broke it off while connecting or disconnecting the heater hoses, which was a real pain. Can you tell me EXACTLY where the port is? And maybe a picture of it so I can locate it? Thanks for your help.  

Answer
If you are mechanicaly inclined or know of someone who is, You will need simple electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.