How to customize/override ContactAddressQuickEntryForm

I am carrying out an address customization for Kuwait.

Added the custom fields and exported the fixtures.

The only problem I have is that Customer DocType Quick Entry Modal is in itself a custom Modal being rendered by ContactAddressQuickEntryForm in ERPNext.

How can I tap into that Modal and customize/override it so it would reflect the address customizations I have done in Address DocType?

Has anyone attempted this? If not, any hints on how to do it?