even though the welder uses them to print the seed phrase
So you gave your seed phrase over to someone else and had them engrave the plates for you? That's a big mistake!
@o_e_l_e_o is correct. The whole point of the guide is to have the washers stamped without anyone having the clue of what you are doing with this very common hardware.
Giving your seeds to someone to print it is the most basic error you could do in seeds management.
I can’t believe you have done such a stupid thing.