I think the guy at southland safes was telling me that when they go bad that the keypad is removed and it is drilled where the keypad was so that when you put the new keypad on it covers the hole, or maybe he meant you drill through, one of the two.
https://www.locksmithledger.com/article/10738632/cannon-executive-vaults-repair-and-replace[url=https://www.locksmithledger.com/article/10738632/cannon-executive-vaults-repair-and-replace][/url]