Noob question--where do I put the oil?!?

Feel free to laugh at this...I just bought this CJ-5 (my very first Jeep after driving an 80s Corolla for 15 years) and I've never owned a four-wheeled vehicle with so much aftermarket stuff... How do I add engine oil?? I've been over the engine a couple of times and the only thing I can think of to do is to take off the valve covers...

Here's a pic:



Thanks for your help in this!

Noob question--where do I put the oil?!?