It's not a stupid question, because there are different ways to do it, and a lot of people who think they are right and everyone else is wrong.
In the last 15 years or so, they army has completely changed their rifle game. It changed from long-range field work to short range urban work with good body armor. To present a frontal picture to the bad guy, we now work the rifle more forward than sideways. This means you have to hold it differently. Use what works. Mag well, AFG, or vertical grip, mounted where they are the most comfortable.