Well PeterK,

It looks like F1 is part A,B,C developer and D is the final rinse for washless process. You can ignore part D for now. F2 is bleach and fixer.

So what to do now is to open the boxes up and mark the containers A,B,C and put them back in the same place in the box. Then measure the contents of each container (in mL) and write the measurement down. If you can find out the tank capacity of each part of the machine this will be helpful.