Module Builder and Before Save Hooks

So I’m building a module and I have some custom before save hooks defined.

I put them in /custom/modules/modulename/savehooks.php (for example)

Should I be putting them in… custom/modulebuilder/packages/modules/modulename/savehooks.php

Will they become part of the installation package? I’m planning to build everything in module builder so I can re-deploy to production.