The Truman Doctrine arose from a speech delivered by President Truman before a joint session of Congress on March 12, 1947.
Positive First. When installing a mower battery, always connect the positive cable first. The positive cable is red. It attaches to the battery terminal post marked with a plus sign, the letter P or the word POS. Attach the negative cable last. The negative cable is black.
Step 2. Disconnect the positive and negative cables from the battery. The mower battery will either have a cable end, like a car, or most will have a bolt that goes through the cable end and terminal to hold the cable on. Either way, the cable can be removed with pliers.