How to connect to my Minecraft Server?

So i made a server for the attack of the bteam and i made it on my laptop not my main computer and the laptop is connected to my main home network and my comp which i want to join the server and it is an extender which is connected to the main network and well extends the network signal and i don't know how to connect the server on my laptop that is connected to the main Wi-Fi from my main gaming desktop which is connected to an extender. If you could help thtd be great thanks.