Then we are going to remove the other two cables.

It's a bit different here. You will have to lift up the black part of the connector ( with an opening pick) , and then pull the cable.

Be careful, when you reconnect this kind of cables. You can see in the second picture that there is a marker. The black line on the cable is aligned with the white line on the motherboard. This indicates that the cable is properly inserted into the connector.