How do I disconnect my alarm kill switch on my Isuzu rodeo. Its killing the battery.?

We have change our battery about 5 time's this year. And notice that it was the alarm that was eating up the battery . we are trying to remove it but, we don't know how since the little switch that you can put up and down is not there anymore. So we disconnected some of the battery but, not all of it. I need to remove it. Any help will be greatly appreciated .