求翻译：2.将Latch装在底板的二个圆形卡槽里，latch缺口槽对准底板位置，用手按下latch，听到“咔咔”声后表示安装正确；是什么意思？

2. load the Latch in the second round card slots in the backplane, backplane latch gap slots alignment location, press the latch with your hands, heard "a big," said after installing the correct;