I updated the photo for a better one - refresh the page pg.

Red - positive
Black - negative

As soon as you hook it up to the battery there is current running through the higher voltage pink wires. Yes you can just disconnect the two pin plug and run some connect wires as an alternative.

Hold the wires down on the battery with your fingers as you are only testing for a matter of seconds and that way if you accidently get zapped with the larger current running through the pink wires, there's a good chance you will break the circuit automatically.