Step 1: First things first..
Step 2: Take one of the Lids
Next take the razor and clean up the holes.
You are pretty much done at this point. Stack the two totes and go ahead and fill'er up with your favorite clumping cat litter.
Step 3: How to use your new box
You may need to do this side a few times till you get the hang of it. It can still be a little messy!