I'm a novice at this battery stuff but you will either need to get a new negative battery cable or cut and crump a new end on it. For the positive side you can drill out the larger cable to fit the larger bolt on the military terminl. You wil probable have to cut and crimp larger ends onto the smaller positive wire. Remember that these contacts need to be done very well and shielded from the elements.
You can get the military terminals a lot cheaper at a NAPA warehouse.