First: Don't close the door with the lock not tested at least 3 times and especially not disassembled!
Second: When you look at the wheel pack, you can see a notch on the top wheel at 44. This is your last number. The other wheels will have similar notches. To see them you will probably have to disassemble that stack. At the top is a C clip, which hast to be pushed or pulled out sideways. Then you can remove everything. Take care to note or keep the order of what you remove, so that you can put everything back in the same order. The next wheel you see will be the second number and the bottom wheel will be the first number.
Here is also a nice video:
https://www.youtube.com/watch?v=x6L_jQJRQXQBtw. SNMA Group 3 means that the body is made from at least 1" steel and the door from at least 1.5" steel.