Worth a try then. But..then they lose their resting place!
They would lose one, yes, but the main reason I put the pad there in the first place was to prevent injury from someone getting a leg caught in the bars of the top of the kennel. Years ago, I had a similar kennel. I never dreamed that any cat would try to walk on it, but one day one did, and lost her footing. Her leg slipped between the bars, she panicked, and when she tried to jump down, she broke bones. So yes, a resting spot, but only as a secondary consideration. I didn't really want to talk about it, as my stupidity still pains me - the leg never healed properly, in spite of the vet's best efforts, and the whole thing could have been avoided so easily.
They do like that spot, but they have plenty of others, and I think it's more important for Mouse to have a litter box that she feels safe using.