UniqueToys Vintage Colour Version MANIA KING

Hello
I have a UT Vintage Color GALVATRON, but it is no power for the LED lights. Do you know how to change the battery for the LED light? I have unscrewed the screw now, but I still not sure how to do it. I attached a photo about it.
Thx!

I have a UT Vintage Color GALVATRON, but it is no power for the LED lights. Do you know how to change the battery for the LED light? I have unscrewed the screw now, but I still not sure how to do it. I attached a photo about it.
Thx!
