Stuck in the basement and now I don't know how things work

went down in the lift and the machine ate my card so I need a new one. I have 3 of the element keys for that S door. I copied the code from the X-ray onto a blank card but don't know what to do with it. and I also the wall safes have letters instead of numbers so my radio frequencies aren't any help unlocking them?

any help in the right direction would be much appreciated, really enjoying the game so far