Adding Templates(.admx) for Windows 10

Hi, we have a simple domain with just one Windows 2012 (not R2) DC. I need to add GP Templates(.admx) for Windows 10. Since there is only one DC we don’t have the Central Store for ADMX files.
So I understand that my ADMX files in C:\Windows\PolicyDefinitions on my DC Windows 2012 Server.
I downloaded templates and installed (extracted) it to default C:\Program Files (x86)\Microsoft Group Policy\Windows 10 Version 1511\PolicyDefinitions.

Can somebody please clarify What should I do: replace the existing PolicyDefinitions folder on new one or copy all files insight downloaded PolicyDefinitions folder toC:\Windows\PolicyDefinitions or something else?

Thank you in advance,
Alex