You could have done a Google search. I did and found these within 2 minutes:
http://www.justanswer.com/electronics/6517j-hi-er-380-electronic-cash-register-sam4s-haven-t.html#re.v/416/
and
http://howtomendit.com/answers.php?id=501917
Note this second link points you to the manual (though I have not tried that link so cannot confirm it is still valid)
XXX
December 2015