Put those cams in the machine, one at a time and test them. Get some solid color cloth and do a test run. Number or mark each design so you have a coded model. Those were the were the Latest thing before the advent of computerized machines.
My daughter has the Brother machine with Cams that I bought in 1969 just before her sister was born. It has a lot of miles but still works fine.
Instead of pushing a button or turning a dial, you insert the cam. There should be a special post for that purpose. Do a Google search and find information on older machines.
Old machines can be fun and work as well as the day it was new.
What is it they say "everything Old is New again"
June