I see said the blind man.
Well unless you what to beat the crap out it with nails LOL yeah screwing it up is the correct way.
I would have thought cutting out the holes making sure its sized up and will fit in the correct space over the framing otherwise your stuffed if you had to do it again and plasterboard thou cheap as it is, will soon mount up in cost. Plus it’s a messy thing with all the plasterboard dust.