Freelander 1 battery clamp

hi, I know this has been covered before but.....I've broken the lip off the edge of the battery and sawed the head off the battery clamp bolt, but.... how do I get rid of the broken stub of the clamp bolt. Do I just smack it through the base of the battery tray with a chisel and hammer, cheers.

Remove the battery tray, about 4 bolts, two on the right hand side and two on the Base, one ressessed and a couple of clips holding wires on. There's a captive bolt on the bottom of the tray that can be pulled out.
Mike