Can't find global inbox in Big Sur?

I just switched computers to a MacBook Pro, running Mac OS 11.2.3 (on M1/Apple Silicon). I reinstalled DEVONthink 3.

As part of setting up the new machine I want to add the global Inbox to my frequently used destination folder list in Pathfinder (by Cocoatech). However, I can’t find the global Inbox! Where might it be?

According to DEVONtechnologies | Questions and Answers :
"The global inbox is stored in:
~/Library/Application Support/DEVONthink Pro 3/Inbox.dtBase2`

However, my Library doesn’t have a DEVONthink Pro 3 subfolder in Application Support. That’s weird. Might it be somewhere else in Big Sur?

My hunch is that on the new machine you haven’t installed it? Menu: DEVONthink/Install Add-ins at bottom.

Bingo!! Thanks so much.