1963 Imperial Vacuum Hoses Under Dash

1963 Imperial: There is one vacuum hose that comes through the middle of the firewall and goes over the steering column. Where does it hook to? There is a short vacuum hose by the emergency brake mechanism. Both ends of the short hose are disconnected. I could not find any information in the service manual. Where does it connect to on both ends? Thank You!
Author: RKC