Time is of the essence here so prepare and lay out everything you need before you start the procedure. Open the CPS-2 B Board using the Torx 20 security bit (and void that warranty you never had to begin with). Remove the PCB and put it down on an antistatic flat surface. Look at the Keystone battery holder. There is a small plastic alignment tap underneath, near the positive (+) terminal. Remove it with the utility knife so the surface becomes level.

Make sure the drill and drill bit is ready.

Note:
I do not use a helper battery because I can perform this procedure in around 6 minutes. Normally the board will survive without a battery for at least 40 minutes but this varies. If you are unsure about your ability to perform this procedure within the time limit, I strongly advise you to use a helper battery.