One trick some video makers use to get a part in focus on camera is to either hold their other hand or a card or other wide object behind the item, to help the autofocus see that item and not the background behind it.
Those screws on the back are "captive screws". You're intended to leave them in the back shell so that you can't lose them. You're doing it correctly. 😀
![Dell Latitude 7290: how to change the CMOS battery [The SIM tray, case and battery need to go first]](http://i.ytimg.com/vi/qWl7k1nDTa0/mqdefault.jpg)
![Dell Latitude 7290: how to change the CMOS battery [The SIM tray, case and battery need to go first]](/img/tr.png)
One trick some video makers use to get a part in focus on camera is to either hold their other hand or a card or other wide object behind the item, to help the autofocus see that item and not the background behind it.
Those screws on the back are "captive screws". You're intended to leave them in the back shell so that you can't lose them. You're doing it correctly. 😀