Are you planning on using one battery only? Nothing wrong with that and thats the I way I started on my jon boat, but after using it awhile, I now use two batteries, one in the front for the trolling motor and one in the rear for the sonar and back up for the trolling motor. I would wire the trolling motor in direct either way, with just a fuse or circuit breaker right at the battery. The length of the wire run to the trolling motor and the size of the trolling motor will determine the size of the wire. You can for sure use that terminal box, but its not really necessary, if the only other thing you are hooking up is the ff. I used 2 conductor shielded cable for my ff, #18, with a fuse holder at the battery and a 3 amp fuse. You don't need to run shielded cable, but I already had it and its high quality stuff and the shield, helps protect the with and prevent interference. I did use a circuit breaker with a "test' button on my trolling motor instead of a fuse, I found that the motor does draw some current even when its "off", so the circuit breaker acts as a switch, saving the battery and as a safety, so know one turns the motor on by accident out of the water. more