How do I safely connect the battery cables during setup?
Always connect the POSITIVE (Red) wire to its terminal first, followed by the NEGATIVE (Black) wire. After connecting, position the red rubber boot over the positive battery terminal to help protect it from corrosion. If the battery was put into service after the date shown on the battery, charge it prior to operating the tractor. (Page 10)
From the official Craftsman T100 Series Lawn Tractor manual, page 10
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