I made an account to help out with this question. I was trying to find out the exact same thing since it was a little different to the beginner version in the book.
I can't find the actual post yet, but there 100% is a post somewhere here with Him answering the same question about the 5/3/1 sets listed for two days.
Now it might be the least definitive answer you could want, but he said you can go faster and progress to the next week as soon as the workout repeats (so 5s and 3s workout in the same week etc) OR just repeat the same weight and sets for the main lift.
So basically, do whatever you like more, or even go faster when you feel good and repeat the same weight for squats/bench when you're feeling a bit more tired or just wanting to practice more good reps at the same weight. You will still progress great either way.
AND another alternative - if you enjoy the extra squat and bench workout stick to the above, it's great and will work. Otherwise just go A/B/A and B/A/B each week, and you still have the option to stick to the same weights twice or progress more like above.
Lots of words, but pick your favourite and work hard, Wendler knows his stuff.