Trouble with Skybox F5S

Hi Guys,

I have a skybox that has blown a fuse on the inside and need some help in opening it up to replace. The problem is I'm not sure how it opens.

Does anybody know how to physically open this box up? I can't see any screws to unscrew or any instructions on the box itself on how it opens.

I can't seem to find a guide online so if somebody can maybe point me in the right direction?

Thanks,