Fix Hoover washing machine door back on?

Hoover Quatto System 1100 Model no AS110

I have a new hinge for the door but I an unable to fix it to the machine. I have worked out how to attach the hinge to the door but not to the actual machine.
I has come with 3 nails do you hammer them in? They appear to be a bit unusual as they do not have the normal head of the nail!