Here's the link to the section you needed in the training portal: https://dovetailmktg.kartra.com/portal/mgsitlogin/subcategory/88
This is probably going to be important for you:
The timing for text alerts in Liondesk is only for when YOU will receive notifications. It does not prevent texts from going out to customers at later hours. Here's a work-around for that involving changing your time zones in Zapier.