Well, you’re right, the large one in the picture is for the fuel rail.
And yes, I found the the oil level plug - it was tangled up between the subframe and the engine. Done.
However, I still can’t figure out the little connector in my previous pic.
Any idea where that goes? The car is fully assembled back together but I get all kinds of codes and the engine is in the limp mode. Before I can fully scan with inpa/ista, I need to finish the hook up, sort of makes sense….

Any ideas?

Thanks