I have two custom modules, module_one and module_two

In module_one, I have a py file and xml which is inherit the res.confi.settings , I add a boolean field name: install_module in module_one which I will use to install and uninstall the module_two, 

The field is viewed in inventory>setting>operations(stock), I used odoo12

How can I achieve this? I saw that some of them use uninstall_hook or post_init_hook in the __init__ and also in manifest BUT i don't understand how to use these? any hints or guides?