There are two ways to launch a Screens Assist link using Screens:
Option 1: Click the shared link
If you've received a Screens Assist link via email, messaging app, or another communication channel, simply click or tap the link on a device where Screens is installed:
Screens will launch automatically and connect to the remote computer.
Option 2: Enter the link manually
You can also copy and paste the link—or type it manually—into the Quick Connect sheet within Screens: