Here you can find stock/standard scheme of wiring a Stratocaster guitar. If you make a modification to your Stratocaster wiring and want to go back do "defaults", you could find this diagram especially useful.
Pay special attention to soldering quality since that can cause you grief in the future when your Strat just stop working. Wiring diagram above is with standard three single coil pickups, one five position switch, volume pot, tone pot for neck, and tone pot for neck and middle pickups.
Electronic components that comes with the standard stock Stratocaster are the following:
If you are new to soldering you still can get the job done with this wiring a stratocaster diagram and propep tools. You will however need good soldering iron and proper solder with flux.
Here are the steps: