in the process of fitting a new carby to my TP and have a problem with all those vacume hoses....

could anyone help me in locating the port on the carby where the vacume switch feeds off..

the vacume switch is the thing that sits on the firewall with ONE hose going to it......im not refering to the other switch thing on the firewall with TWO hoses going to it (what is that thing)?

cheers