Next to this little white connector there are three ZIF connectors. These need disconnected too. During my first attempt at this I reconnected the white connector first when reassembling the unit. This appears not the best order of doing things. You may want to put the black plastic cover back first, followed by connecting the 3 ZIF connectors. Then continue to re-assemble the unit and leave the white connector to later.

Before removing the black plastic bracket you need to remove one more screw on the motherboard (top centre))

Before separating both parts I had to remove one more #000 screw - right side of the lens (Hero4 Silver)