Broke 2 battery box bolts, how to remove???

The never ending battle with the SJ just keeps going this year. I was talking the battery box out so I could pull the fuel tank and replace the steering cable and 2 bolts broke of as soon as I starting turning them out. Of course they broke of down inside the hull 'fitting' a bit so I can't get anything on them to turn them out. Any suggestions on how to get them out?? I don't have or have never used an easy-out, should I buy one and see if they wiill come out??
 
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