Not exactly sure what you mean, so here’s my understanding of how pamac operates.
There are two programs, pamac-updater (for updates) and pamac-manager (for installs). Technically, pamac-updater is a symbolic link to pamac-manager. So they really are the same program (pamac-manager), but the program internally sees what was the name of the starting program (either pamac-manager or pamac-updater) and acts accordingly.
Starting pamac-updater goes directly to updating view.
Starting pamac-manager goes directly to installing view.
And clicking pamac the tray icon goes to either updating view if there are updates, otherwise to installing view.