How to install battery in ACA card?

[mfilos]

Back in the days where AmigaKit provided a kit it had the following:

ACA 1230 Real Time Clock Upgrade Kit is a Real Time Battery Backed Up clock chip and coin battery for the ACA 1230 Accelerator
Clock chip and battery can be installed onto the sockets provided on the accelerator.

Package Contents:
  OKI M6242B (Or Equivalent) Clock Chip
  CR1220 Coin Battery

So you only need the Clock Chip (if you don't have already) and an CR1220 battery