How to kill Vox Engines in Helldivers 2

If you've just dropped into the hellish battlefield of Cyberstan in Helldivers 2, you're likely already wondering how to kill a Vox Engine. These are the heaviest new Automaton enemy—a rolling arsenal of lasers, miniguns, and rocket barrages, and they're seemingly very tanky, at least to conventional explosives, orbitals and airstrikes.

Well, after getting far too close for comfort, I've found the best way to kill these behemoths—a secret weak spot, if you will. Below I'll explain where...