I am assuming that you are working on something other than an FRC robot.
It would be best if you could insert a fuse between the battery and the terminal block. Those batteries can source enough current to do some damage if there is a short circuit in your system. Choose the fuse rating to be 125% of the total expected current, or the next higher available rating. You may still have to go up a size or two if the expected current is low. The motor controllers will consume some current even when they do not have a load connected. If the total current is less than 10A, you can use an inline fuse holder like the one linked below. They are available at Radio Shack and auto parts stores.
http://www.radioshack.com/10-amp-inl...1.html#start=1
It would be best if you replaced the un-insulated crimp lugs with insulated crimp lugs. The positive and negative lugs are pretty close together and it would be easy to short them together. The bottom of the two lugs can be flipped over so the two lugs do not have to splay apart. You may also want to change how much insulation you strip off the wires. The two red wires at the lower left of the second picture are too short. The single black wire at the right is a bit too long. The single red wire, second from the right, is about the correct length. Make sure you do a pull test after making each crimp.