[2008si]

Totally new to this car. I googled this leak I have. In this pic I oil sitting below the black round cap (Oil filter cap?) on top of the oil cooler. Below that you see the leak is hitting the rad hose going in under that area. The front of the motor is oil free/very clean. The belt is in great shape, no squeals from an oil drip if active. Is there a seal at cooler to housing it is on? Is that black cap leaking?
I don't have a bad leak, everything is just kinda sweaty covered in oil.