This is the best one that i’ve seen.
If you are not planning on connected the external switch, you can just leave that off. Otherwise, the neutral goes to one of the N in Line to the L in and Load to the Lout. Pretty simple.
Please be careful. You’re dealing with 120v here, and while not normally fatal, it can be very dangerous. If you’re not 100% sure what you are doing, call a professional electrician. And make sure you turn off the breaker before you touch anything.