How to open and change batteries on giant head light

[cifro]

When I bought a Giant bicycle for my son a year ago it came with this head light. There is no connector for a USB cable so I assume I have to take open it up to change the battery. However I seem not to find the right nick to open it and I don’t won’t to break it. Aby suggestions how to get this done?

 

[Sharky]

any clues in this video?
Warning - the presenter could irritate, but shows how with one model at the half way stage.

View: https://youtu.be/kn7CGinbXu8

 

[cifro]

any clues in this video?
Warning - the presenter could irritate, but shows how with one model at the half way stage.

View: https://youtu.be/kn7CGinbXu8

Thanks, but it won’t open like shown in the clip. Will go to the bike shop tomorrow.