Wires, What are they?

The little white rectangle box with 4 prongs is your ballast resistor. The brass coloured box that you've got the big red and big brown wire to, is your starter relay.
I would disconnect and remove the green wire on your starter relay that you have connected in with your big brown wire, and is also underneath the hex bolt. It looks to be a ground somebody once used, but the way it is connected now looks as if it is touching the big red wire, which goes to the positive terminal on your battery. If so, that is a dead short, and you want to avoid that.