Thats the fan box Fred. I know it's hard to see but where I'm shining the light is 3 baby mice. You can see them moving a little. I think you can hear them too. I plucked them out and had to dispatch them. I sprayed a strong chlorine mix in there and meticulously plucked the blood and guts out of the squirrel cage or should I call it mouse cage. Funny thing, it didn't stink. Caught it soon enough I guess. She was complaining of a fan noise.