The connector has a plain black side and the other side you can see the 2 silver connectors.. the side you can see the 2 silver connectors faces the front.. the plain side is to the back/against the logic board.
Did you get to the bottom of this?.
Did you get to the bottom.of this?
Are you able to swap out the HDD for the SSD using this method? - I can’t tell from the pictures if there is enough access there or not?..