microsoft word - MS Office COM add-in registry location

I have some COM add-ins in Outlook/Word that I'm trying to manually configure in registry, but I am unable to locate the corresponding entries. According to https://msdn.microsoft.com/en-us/library/bb386106.aspx, they should be located at

(HKLM|HKCU):\Software\Microsoft\Office\application name\Addins\add-in
ID

or

(HKLM|HKCU):\Software\Wow6432Node\Microsoft\Office\application
name\Addins\add-in ID

and I do see some add-ins there, but not all. Where are the remaining add-ins?

Thanks!
Yevgeniy