Dynamics Portals - Change Parent Account on Profile Page

Hi All,

I'm trying to change the relationship reference to the Parent Account on the Profile Page. 

Below i found a link to hide the page all together, But I only want to change the account.

https://community.dynamics.com/crm/b/mahenderpal/archive/2018/08/09/modifying-profile-page-in-dynamics-365-portal

By default the Parent Account  on the portal is displaying the Parentcustomerid on the contact entity (contact_customer_account).

I would like to change this if possible but i'm not sure with entity permission to alter as there are quite a few.

many thanks