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.
Photo 2: Hook-up at the good battery. Connect to the positive cable to the positive terminal and the negative cable to the negative terminal of the good battery. Clamp the positive (red or yellow) cable to the positive terminal of the weak battery.