I was just about to post the same question. Would love to know how to have my credentials pre-populate every time I want to connect to a computer.
Scott and Aaron,
Here are instructions to set the default credentials:
Close the connection window
Click View-> Default Host Properties
Click on the "Authentication Options" tab
set the credentials here click on Apply and OK
You may be asked if you wish to update existing entries, if you desire to do so ensure "include authentication settings" is checked and click on apply all