I don't know carver, but generic info is available.
a) is it a toggle or is it a breaker?
b) Many breakers and toggle sw's have a "threaded tube" on the switch/breaker body. This tube extends through the panel and is secured by a nut. Wires are usually connected with a spade lug type connector, though screw attachments do occur.
c) there are other methods.
More info will likely get more/better answers.
Questions occur such as:
Which panel?
Breaker or Switch?
What do you see when you look at it? ie: describe what you see.
Does the sw have a "boot" or is it an exposed paddle.
We are all waiting to help!