"A man's got to understand his limits," said Clint Eastwood in one of the famous Dirty Harry movies. The same philosophy is true when designing any drone. It's always good to have more capability than is truly required. However, you certainly may consider bringing it down a notch or two in practice. You'll see what we mean in a moment.
The three types of components we're going to be interfacing with on the car are the Electronic Speed Controller (ESC), receiver, and servo(s).
Most RC cars only have one servo (to steer the wheels), but sometimes multiple servos exist (for example, four-wheel steering). We'll worry about the servo later. After all, we don't need to actually get at the servo. We just need its plug (which will be attached to the receiver). Servo wires are very easily identified. They are always three wires and are either colored in a white-red-black or yellow-red-black color scheme.
The ESC is also easily identified as it is where...