Why you are simulating this model with a connector? you can also use the same wave port at port1 as you created for port 2.
If your connector has a single terminal, then where is the return path? The connector must have two terminals. One is for the forward path and another one is for the return path.
Please refer to the SMA_RF_Jack 3D component available in the HFSS component libraries.
The below screenshot shows the SMA connector which has two terminals: