Hi,

Here’s a link to a video that shows how to completely dis-assemble the camera.

At 6:29 minutes into the video the section containing the battery cover is seen being removed from the camera.

I do not know if you have to dis-assemble it that far but hopefully the video may help you to at least gain access to the lid.

Have you noticed the cost of a replacement part? There are other suppliers but they are all around the same price. It’s even more if you have this model A6000 It seems a lot to pay for a small (is it plastic?) part