they actually have a sep by step for some fixtures with detailed pics of how to retrofit the fixture type to induction..needless to say its been helpful on the job!
they probably have instructions on how to do it because it likely has to be done a specific way to validate any UL or safety listings. I've seen those induction retrofits in floodlights like that. They're a lot dimmer than the MH they replaced but the light from them is very pleasing unlike LED where the light is dimmer and horrid to look at.
I guess there should be a hole template for drilling the mounting holes for the driver and lamp too. I've seen induction fixtures before, some look a bit like a dimmed out merc.