The hole will vary in placement for every dryer. When I mounted mine for instance, I made a raised platform for the dryer so the cat litter box could be under it. I was very happy that there WASN'T a hole already cut as it would have been too low.
You'll need to pick out your unit and then drill the hole where it needs to be.
You could also use the newer Spledide that is ventless I would guess.
Vaughan & Tracy 2013 RW 36RL, 2013 F350 DRW CC, 2016 Focus. MorRyde IS, MorRyde pinbox, disc brakes, Comfort Ride Hitch. "Life is to be embraced, Grab it with both arms ! "