Battery change in CLX-3185FW

[r4v3n6]

I was not able to reply to other threads unfortunately as they were locked 😞 (it is easier to follow if you allow replies about same problems to continue)

My battery is not working. Even though I have power cord connected, it resets time on every start and when that happens I am unable to shutdown the printer until I have set the time which is very annoying. So I want to try to replace the battery. I have found 2 links with similar, and it seems to be inside the right side of the printer. But I don't understand how to remove the right side panel. How exactly do I open up the right side of the printer? 

I looks super easy on the video, but I have not found any things to pull to open it up. Do I need to loosen screws underneath or elsewhere to make it open up. 

https://h30434.www3.hp.com/t5/Samsung/CLX-3185FW-backup-battery-change/m-p/8366056/thread-id/6236

https://h30434.www3.hp.com/t5/Samsung/Battery-Change-for-CLX-3185-CLX-3180-series-printer/m-p/899129...

https://www.youtube.com/watch?v=sSxz0H4DfXg

Update : 

The screw on the back right side was key first, but after that the cover was not easy to get off. It sounded like mine broke a bit, but it came on fine afterwards. You can put the machine on the left side down and open the cover a bit and the battery is deep inside on the right side, but it is held with 3 side clips so was not easy to get off. I had to open it up more fully to get it off. A shame the battery is not easy accessible. There is even a small box under the scanner on the right side if you just lift it up with a lid easy accessible where the battery could be placed instead for easy exchange. This is the first place I thought it would be in, but unfortunately deep inside the right side.