Inherited a ZME_KFOB2 how do I add it to the z-wave network?

I’ve inherited this cute little keyfob for z-wave from a friends cleanup, and I’m trying to figure out how to add it.
Has anybody gotten this to work? The z-wave stick is an aeotec gen 5
It has probably been added to some other network previously, and could have very well been bought in china, but I’m trying this with pressing all four buttons, and then go into the integration and press add node, but nothing shows up???