Unless your cats are young kittens, they should not be kept in cages at all, unless they are recovering from something like a broken leg. A cage *is* a cramped place. They can't walk around. They can't look out the windows. They can't get in a good stretch on scratching posts. They can't play. Sometimes one cat just doesn't want to be so near another cat- even if they do like each other, but if they are both in the same cage, there is no escape. Cats do not like their food and water near their litter box, but in a cage, there is no choice. Also, many cats do not like to urinate and defecate in the same box. In a cage, there is only room for the one box. (Hopefully you do have more than one litter box.) If one or more cats does defecate during the night, they are forced to be right near the smell. They surely don't like that. If they had a choice, they would not sleep next to doody. Or urine smell. What if the area where the cage is feeling too cold or too hot? The cats cannot move to another section of the home where they feel more comfortable.
Cats are mostly nocturnal creatures who are biologically attuned to be active at night. Being kept in a cage for all those hours at night is going against their nature. They don't naturally sleep for 7 hours at a stretch during the night, as is typical for humans. So yes, if they could talk they would tell you they do mind being kept in a cage for hours. Of course they mind. I hope you reconsider and let them out all the time. Why can't they "wander around" the house? Isn't it their home too? If your house if full of dangers, you can "cat proof" it. I really think it is cruel to keep healthy cats over 5 months old in cages. If there is some important reason to limit their movement through your home while you are sleeping, at least keep them shut in one FULL room. That would be so much kinder and condsiderate to the cats.