Use WordPress Plugin without WP head

I have created a custom post template without the WP Head and footer because I don’t want to load any of the themes and plugins.

Now, I want to cache the custom post template by an SG Optimizer Plugin. How can I add the SG Optimizer to cache this custom post template?

Plugin that I want to load: https://wordpress.org/plugins/sg-cachepress/

Here’s the template as follows: