Adding text onto Manage Bank Accounts Page

Content

I am looking to add some text onto the Manage Bank Account Page in expenses for my customer.

i can do this using a sandbox, identifying the panel that i want to update and adding HTML Markup

However, the pages that i am looking to update are "shared component entity" and i get the following in every panel that i select

Confirm Shared Component Edit

Are you sure you want to edit this shared component?

You are opening a shared component for editing. the changes you make will affect this instance and every other instance of the component on other pages.