Need access only to create Trading Partner items and item relationship by using custom role

Summary:

we have requirement to give access for a specific group to create Trading Partner items and item relationship.

when we are giving to Manage item relationship privilege we are getting all access under relationship tab.

Content (required):

Let us know what are the main privileges are need to achieve this.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):