As per my previous post, the choices are listed and explained in the MD_MAX72xx library documentation. No need to Google. You can just read the documentation that is in the docs subfolder of the MD_MAX72xx library.
Even easier is to run the MD_MAX72xx_Dynamic_HW example to display text on the display while cycling through the library supported hardware types. It prints out the module type on the display - the one that is legible on the display is the type of hardware being used.