@Mcey your listing is way more helpful than docs (which is moved to: https://devdocs.prestashop.com/1.7/modules/creation/adding-configuration-page/)
But, can you please tell me how to check if desired checkbox was selected or not. Or how to set a value to it?
[EDIT]
OK, i know, how to get value, it is simple:
$test = Tools::getValue('cehckbox_name');
// you will get: "on", or false/null
[/EDIT]
I've been trying with: 'value' => 1 in 'query' items array, but have no luck.
[EDIT]So there is no point to try to set value to checkox[/EDIT]