CRED plugin provides an API, making it easy to customize your post or user forms. The API includes hooks (actions and filters) to accomplish specific tasks using PHP code.
When you ask for help or report issues, make sure to tell us all related information about your form and what you want to achieve.
Problem:
The customer asked how to create a post-relationship when a form to create a new post is submitted.
Solution:
Guided that this will require a custom function, attached to the "cred_save_data" hook, and will use the "toolset_connect_posts" function to connect the two posts.