leaking what i believe is oil from the passenger side of engine

What is your question?

trying to figure out where the leak is. it is leaking on the passenger side of engine. Dont see no leak or anything sitting on top but towards back it look like is sprayed from hitting a belt. a while back noticed it when i had to change the serpentine belt because of that. Still unable to locate leak tho. Went 3 days and approx. drove 60-80 miles and didnt lose any oil (according to dipstick) any ideas?