Carburetor linkage Questions for 67 Dart

Have never installed a throttle cable so I have no experience with it.

How do you do a fine adjustment on the throttle cable using the metal sleeve that connects to the carb? Can you twist it right or left? Does it have to be disconnected first?

It looks like I have about 2" of cable showing and I assume that's the max amount it c/b adjusted?

Throttle linkage 67 Dart.jpg