Cruise control with manual trans

What I am looking for is a run down step by step of how the system operates, from the switch on the column down to the carb and everything in between. Just a quick fairly thorough synopsis if anyone happens to know that info.

Someone mentioned an electric actuator for example and I believe its mounted near the vacuum pod but not sure. Id like to know how all this works so I can have a better idea of what I am working with.