RSSP Set Guided Journey Task Codes in Business Rule

Summary:

What is the correct way to enter a value and multiple values in array [ ] fields in the business rules?

Content (please ensure you mask any confidential information):

Within the Create Request pages, you have the ability set guided journeys and tasks within the page properties, additionally you have the ability to set these values within the business rules. We would like to set these values within business rules, as we would like to display different journey details for different business units.

Setting the journey code in the rules is no problem, however, I haven't been able to work out what is the correct way to enter values for the journey tasks, what is the correct way of entering values in these fields please?