Check the terminals and clamps for corrosion. If they are corroded, rinse with a solution of one part baking soda to four parts water. Dry terminals and clamps with a cloth.
Place the battery in the battery bay. Slide the red positive (+) battery clamp over the positive terminal of the battery. Tighten the screw on the side of the clamp with the spanner or adjustable wrench.
Place the black negative battery clamp (-) over the negative battery terminal and tighten with the spanner or adjustable wrench. Always remove and replace the negative terminal last.