If you're using KymaConnect, then it can use the Wi-Fi that's built into your laptop, so it should work the same (it's not necessary to rely on your home network). Expansion port B is gigabit Ethernet, and KymaConnect (running on the Mac) can use the laptop's Wi-Fi antenna to communicate with your iPad.
On the iPad, in Settings (gear icon), under Wi-Fi, choose the network that KymaConnect creates (rather than choosing the name of your home network).