In fact, you get a set in each box! Lol. Here's a close up of the inner head holes.
View attachment 1715019318
View attachment 1715019319
Each inner head bolt hole is intersected by an oil drain passage which is just flat strange. Here's the top side of the oil drain
View attachment 1715019320
Further examination reveals the fact that these threaded holes don't even line up with the inner head bolt locations so there must be some other reason why they're there.