Mine is located in that same spot as well, but I have the smaller compressor.
I think I had to drill a hole or two and used the reinforcement plate on the bottom to prevent the hardware from pulling through. I only have one picture...
That's exactly where I put my ARB dual as well, in the rear cubby. Only I'm lazy (so far) and just put a quick release poking out through a hole in the cover.
My wife's '96 has the compressor tucked inside the driver's side rear quarter panel (behind the plastic) and a tank underneath where the spare used to be.