What URL for creating new connection should I use?

What URL for creating new connection should I use?

Hello, 

I am a bit confused about the URL required while creating a new connection.

In the tutorial this https://abeeway-dev1.thingpark.com:50540 is being used as the sensor is an abeeway one.

What URL should I use for a generic device? Isn't there a generic URL that gateways transmit to? 

thanks