So the lugs are already threaded into the hub, and I'll use lug nuts to fasten the wheel onto the hub, vs. lug bolts (like my VW Jetta), right? Sorry to be so dense...
STUDS - that was the word I was looking for! The studs are mounted in the hubs, also keeping the brake discs in place. The wheels are mounted onto the hubs, with the studs protruding through the wheel bolt holes, and lugs ("nuts") are used to hold the wheels on...I get it!!!