You can put the meter onto the current scale and place it in series with the posative (+) lead from your battery. set the meter to an appropriate scale. You will need to cut the (+) lead to do this.

Or if your meter does not have a current range then you can place a 1 Ohm resister in series with the posative lead and put the voltmeter accross the 1 Ohm resister. The current is found by the formula I=E/R where E= the voltage read on the meter and R= 1. So for a voltage of say 2volts the current would be 2 amps. The resister should be of sufficent wattage to carry the expected current.

P=I*E so for an expected current of 2 amps the power rating of the resister should be at least 4 watts.

Regards