Vacuum lines

I have a factory a/c car and all the ac stuff was gone and no heater hoses. i really dont want to change the heater box and i am trying to figure out the whole vacuum thing. I also have three hoses coming out of the firewall but dont have the thing that originally went on the inner fender or ( if there was one)one in the heater hose/s.

Do i need to find one that goes on the inner fender and replace it and maybe one in the heater hose for those vacuum lines to connect to. Or can I just block the two ( red and white striped ones) and connect the solid ( no colored stripe) black one to vacuum and just run the heater hoses the way they would go normally



thanks