Pull the right edge of the logic board slightly away from the rear case to dislodge the rear I/O ports from their bezel.

Tilt the top edge of the board away from the rear case and lift the logic board assembly out of the rear case, minding any cables that may get caught.

When reinstalling the logic board, it is helpful to use tape to temporarily tuck the cables out of the way until the board is properly seated in the rear case.

During reassembly of the logic board, pay attention to the position of the I/O connectors. When the board is back in the case, insert a USB or Thunderbolt cable into one of the connectors to align it perfectly.