Next, while holding the new hard drive cables against the GPU heat sink, lower the bottom edge of the logic board back down into the outer case.

When re-seating the logic board, it is helpful to tape the many connectors that attach to it out of the way to avoid them getting trapped beneath the board.

Before pushing the logic board against the back of the outer case, first route the hard drive cables in the channel near the bundle of power cables.

As you place the logic board into its recess, route the hard drive cables through the small channel cut into the plastic pressure wall near the fins of the GPU heat sink.