Adding a Meta Box to an Existing Post Type

Correct, you do not want to declare a new Super_Custom_Post_Type for psots or pages. Instead, you’ll want to instantiate Super_Custom_Post_Meta and pass it ‘post’ or ‘page’, then you can call add_meta_box on that object. Something along the lines of:

$post_meta = new Super_Custom_Post_Meta( 'post' );
$post_meta->add_meta_box( ... );

For future reference, you can find all the documentation here, which covers doing this.

Hi Matthew,

Thanks for the support!
This works, however, when I use this functionality the connect_types_and_taxes function does not work to connect custom taxonomies to this post type
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Call to undefined method Super_Custom_Post_Meta::connect_taxes

That is correct. As mentioned in the docs, you can only pass Super_Custom_Post_Type and Super_Custom_Taxonomy objects through connect_types_and_taxes.

To connect a custom taxonomy to an existing post type, call the method connect_post_types on the Super_Custom_Taxonomy object and pass it the post type. For instance,

$authors = new Super_Custom_Taxonomy( 'author' );
$authors->connect_post_types( 'post' );

Great!