Question: Ignition and T4 universal wiring kit

If you would have posted this before you bought it, nobody on this site would have allowed you to buy it. What awful, uninstructive destructions!!!

How do you know what sizes the fuses are supposed to be?

First thing I'd had to do in trying to use that for anything would be to sit down and diagram what wires go/ to / from and to what circuits/ fuses they are connected