Battery wires

hey, I just got Dean's for my batteries and I know this is kinda newbish but you know the red and black wires, I just need to know which one is postive and negative

hey, I just got Dean's for my batteries and I know this is kinda newbish but you know the red and black wires, I just need to know which one is postive and negative

red = +, black = -

thanks btw do you absolutely have to completley disharge the battery before installing teh new connectors??