After you have defined your permanent cabling (See Building Plan), you can connect Network Devices like Switches to the cabling.
With the Button you can patch a Switchport with an Endpoint like Patchpanel Port.
Example: Switchport Gi1/0/1 is connected with Patchpanel A, Port A01
Important Note: You have define the Patchcable (=short network cable) which is between the switchport and the permanent cabling. In most cases this would be the Patchpanel Port.
now you seed the Connected Endpoint for Network Interface Gi1/0/1