We now turn our attention to the main board. We need disconnect 2 cables marked in red on the picture.

Most likely there will be tape covering the connectors. Remove this with a pair of tweezers.

We now can see the connector. Using a pair of tweezers to lift the little arm that holds the cable into the connector. I have marked the arm in red in the close up photo. Please be careful with your tweezers as the arm of the connector is very fragile.

Using your tweezers again (very useful tool) carefully pull the cable out of the connector.

Now repeat this step for the other connector which is the same.