Portal 7.3 LogonHelpApp Customizing screen texts

Portal 7.3 SP10

I am trying to customize the Logon Help screen, this is the LogonHelpApp screen that appears when you click the link on main SAP Logon page for Logon Problems.   See below screenshot

I

I need only to change the text labels Logon ID , E-Mail

Can anyone help me please with this requirement

I have been successful customizing the Logon page but have not been able to find any information on changing the text labels of this App.

Thank you in advance,

any help would be appreciared.

Sarah