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.
Start at one end of the batteries... Start at one end, and connect the positive post of the first battery with the negative post of the second. Connect the positive post of the second with the negative post of the third. Repeat the process until you get to the end.