Swapping out the PSU on the MAC PRO. Help please?

Hi-

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First, you have to remove the hard drives and carriers, the optical drives and carriers and any PCIe cards.

Put the tower on its side, and remove the four 2.5mm hex screws from the underside of the media shelf.

Then, push down on the upper right corner of the PSU, and slide it forward.

Now, you can lift it out, but still have to disconnect the wiring harness. It is best to get a cloth to lay between the PSU and the tower, so that you can rest the PSU on the tower, without scratching, while you disconnect the 4 connectors of the wiring harness.

Start from the top, working down, depressing the latch, and releasing each of the 4 connectors.

Install of the PSU is in reverse of the above. Make sure the connectors, J1, J2, J3, (4 isn't marked) go into the appropriate PS1, PS2 PS3, and PS4

With the tower on its side, in the top row of screws, from the rear, remove the first and third screw.
Along the bottom, there are two screws that need to be removed. These two are the two below the row of four screws.