The servo is connected to the car by the servo mount. Servo goes into channel 1 on the receiver.
The servo saver, horn, arm (different names) goes from the servo to the bell-crank (there is usually a drag link between the horn and bell-crank)
Then there is the bell-crank
Toe links are connected to the bell-crank and hubs
And that's the steering on an RC.
Note: For the bell-crank, they are usually on pegs and slide around. I would use bearings instead of bushings so the steering can move freely. Don't over tighten steering screws. I learned that the hard way when I started in the hobby.
Some RCs has a different steering set up like a 2wd stampede which doesn't use a bellcrank and uses just a servo saver.
Some servos mount directly into the chassis like a 2wd slash (HCG)
Ohhh, this is in the Nitro section. Well above is for all of the steering.
If it is a servo for like throttle or 2 speed trans or something else:
Servo mount, servo horn, drag link, and then to the part you want to control like the throttle or trans or something along those lines.