After spending several years working with Google Sites Classics I started realizing there are ways
ways to do this but I will be going through the most common version.
This option does not work in the HTML box that is native to Google Sites. We will be using the Mori 79 Code Wrapper
and in the embed, we can place the references to those external documents.
I will be using two external files
Samples of Google Sites Classic websites using this: