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I think the orange circle refers to a 4th gate connector which needs to be disconnected.
What does the orange circle refer to, as the text is a duplicate of the red circle description (and the highlighted item isn't connected with the three gate connectors)?
The orange circle in line with the 4 other red circles down the RH side (as shown) in the photo should be red also, as this shows a screw, not the cable (which is by the volume buttons).