It will be stamped on the lip, between two of the spokes. Viewable when looking at the front of the rim.
I also need to talk to you about lug nuts. The rim seat on these are thick enough that there wasn't enough thread from the stud sticking through for me to feel safe using the stock lugs. It only took 4 turns for them to be tight, and that just wasn't enough for me.
I bought extended thread (E/T) lug nuts from wheelers offroad
. They are conical seat but have a shank on the end so there is a lot more thread contact. Here's the link to them (halfway down the page).
Hope this helps!