How do I press the button "Open" of a file picker after selecting a fi

Hi guys.
Here is my AppleScript to open Moneywiz and automatically select the “Import” menu item.

tell application "System Events"
    tell process "MoneyWiz 2"
        set frontmost to true
        click menu item "Import from a file" of menu of menu item "Import" of menu "File" of menu bar 1
    end tell
end tell

A window with file picker is opened when I run this code and I would like to select the file in the picture below and click the “open” button.

Any useful hints?