Best way to get 6x9 speakers in the hatch?

I found a set of brand new Sony 6x9 speakers in the building yesterday, and figured I might as well try to find a way of putting them into the back of the car since I'll be working on it most of the day sound deadening it.
What would be a good way to do this? I was thinking about the stock area for the extra speakers beside the back seats, but my welder messed up a few weeks ago and have no real way of making custom brackets for it.
What would be a good way to do this? I was thinking about the stock area for the extra speakers beside the back seats, but my welder messed up a few weeks ago and have no real way of making custom brackets for it.