 To connect several monitors, you should first make sure that your computer supports such an option. Just stick the cables into corresponding outputs and Windows will extend the desktop automatically. If it didn't happen and both monitors show the same image, you can fix the problem quickly by pressing the key shortcut Windows plus P. To set the devices manually, right-click on the desktop, choose Display Settings and click on Detect. Then on Identify and you will see the number of each monitor shown on the display. You can also select which display will be the primary one. Select the one you need in the upper part of the window and below check the option Make this my main display in the Multiple Displays section.