Put Mainboard connected with E Assembled USB Cable on top of Handle with Trigger Kit.
Put Front Cover Kit in front of Handle with Trigger Kit.
Tile into Top Cover Kit. Keep the back edge of Top Cover Kit align with the back edge of Handle with Trigger Kit.
Then press the front of Top Cover Kit down with Handle with Trigger Kit.
Take two #2 Screws and fasten the Top Cover Kit and Handle with Trigger Kit by #2 Phillips Screwdriver.
Caution: Keep the USB cable plugged on the MB tightly through the Bottom Cover.
