Hellcat- Some oil spray on engine fuel rail covers

Alright so I went out to NASA road racing this weekend. I popped my hood after session 7 of 8 for the weekend and noticed a little oil on the engine fuel rail cover. It was focused more towards the front of the car (picuture below is from today so it has seen spread more evenly towards the back). Engine oil Temps were fine and no other service codes came on. I went out for my last session and there was a little more oil spilled but only slightly. I went pretty hard on it all weekend. I had an hour drive back home after the track which didn't seem to cause are more oil leakage. I'm guessing it came from the oil cap because I'm not seeing any other potential source for the oil. Im not overly concerned but thought I'd lob the question out to see if anybody has experienced this. And whether it should be a concern. I'm a bit of a newb when it comes to engines so any guidance of what may have caused this would be appreciated. Maybe there is an o ring or some rubber gasket I need to replace in the oil cap???

Also dumb question but why isn't there a dip stick?

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