At this point, if you have not tiled the floor or shelves, do it now.
Carefully unwrap and attach the chicken wire to the outside walls of the cage, trying to keep it stretched. I advise using an excessive number of staples to attach any part of the chicken wire that the cats will be leaning against, or this area is more likely to break under the stress.
Phwew! Almost there. All that is left is to attach the lid.
Attach the lid to the top with hinges and latch, and you're all done!
Add a cat for size.
I think she likes it.
And finally, who it was all for. With a nice warm blanket and a litter box, our rescued kittens can settle in until they're old enough to be adopted.