Hi Robert, as far as I can tell you should be able to add an AP30 to Connect just fine, no licenses needed.
Quick note- adding any kind of license to a Connect instance will convert it to Pilot, and that's a one way conversion so to go back to Connect you'd have to register for a new instance all together.
A good test if you're wondering if a certain model is usable in Connect is to try to simulate that device model (Manage> Devices> Plus Icon to add new device> Quick Add> Simulated Devices> Choose the model in question from the drop down list). If you can simulate the model, you should be able to onboard that model as well.
