Before you remove the defective board from the drive, examine the cables attached to the terminals and note the IDs assigned to the terminals. Write on a tag or sticker the ID of the connector to which each cable is attached and attach it to the cable. There is also a 2-pin connector on the board. However, since there is only one 2-pin connector you can disconnect it without attaching a tag or sticker to it.
Make sure to find an angle that provides you with a good view of the board cabinet so that you can remove the board without damaging other boards or components in the drive. Carefully insert the screwdriver into one of the screws and loosen the screws. It might be helpful to use one hand to guide the screwdriver to the screw. Hold the screw with one hand when you remove it and keep all the screws and washers together and ready to be used when you install the replacement.