Dell T5820 - Third Flex Bay removal

Hello,

I have a T5820 with Core-i9 9900X. I have two 3.5 Drives and the one M.2 NVMe bay. I'd like to add a third hard drive to the remaining bay but I cannot get the factory bezel off. Also, if I shine a light behind that bezel, I can see the connector and it has a yellow sticker over the 'do not plug in'.

What are my options here? The videos and manuals do not call this out at all.