Contracts related subpanel in Sugar mobile not populating

I have attempted both V12 and V13 on premise, yet I'm unable to determine how to populate the Contracts subpanel (Related) under the Accounts module in Sugar Mobile. Despite confirming its presence under the Displayed Subpanels in Admin, it remains unpopulated. Could I be making an error?

I am testing using root admin so there are no role restrictions at play 

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