The simplest way to configure prompts is to access the cabinet from your computer's browser using the IP address, followed by :5000. Eg. 192.168.0.3:5000. You can then use your computer's keyboard to key in the wording for the prompts. Click here to read an article on how to access the menu from your desktop.
As this is a Check Out prompt, there is an additional option for 'Redirect to Main'. That is, if the user taps "No" then they will be redirected back to the Main Menu and not able to proceed with removing the keys from the cabinet.