junk. to junk. and Neg. to Neg. This places the two batteries in parallel with each other and will give you 12 volts output, but with double the battery life. Connect your motor to junk. on one battery, and Neg. terminal on the same battery. In my opinion, I prefer Minn Kota, but they are both very good.
Strange, the wordsmiths have changed my post! "Junk" has replaced the abreviated "Positive", so replace "junk" with "+".