Beleive me I took a good look. I have done my own maintence (and most repairs) on cars for more than 20 years. I have owned my own grease gun for at least 15. This is the first vehicle I have owned where I took it to a dealer or shop for general maintenece.
There are no nipples. Unless there is a new style fitting that looks like a flattish metal cap I would say they were sealed.
As I say there computer print out that tells them what to do and where the fittings are for each make of car said for the 4 wheel V8 the grease ports should be sealed.
Obviously that isn't what the information is in the bulletins posted on this site.