Add external JAR to WebSphere Commerce

I got the recommendation below while trying to deploy a third party jar. I tried so many places and the only that worked is the lib folder under Stores web module as explained below.

WebSphere Commerce forum:

The proper place to deploy third party libraries is in the Stores web module (Deployed Module: Stores.war/WEB-INF/lib, Toolkit: Stores/WebContent/WEB-INF/lib).

Any jar files placed here will be picked up automatically without requiring modification to the Web module MANIFEST.MF. This is the recommended approach.