Once you click on "Configure Screenlogic" on the first screen, you'll click the larger "Configure Screenlogic" on the second screen.
On the "General Settings (1 of 5)" page there is a button near the bottom of that page "Set Remote Access Password". Click that and set your password.
When away from the house start the SL app and click the "Remote" button - it will open up the login screen. Enter your identifier like Pentair: XX-XX-XX in the name field and your password in the password field and you'll be connected while away from the house.