I used to know this shey1t, but by now its just too late.
I don't even see any such thing like "Product Instance" (and I forgot why SAP just won't use "normal language" in these things anyway, lest they want you to have to go to one of their costly seminars to understand what-the-heck a "Product Instance" is anyway, compare to a "Product System", compared to a "Technical System").
So I forgot this late at night, and I can't find any tab labeled "Product Instance" or any tree node with that name anyway.
Lost in this @#$! and getting very frustrated here.
This used to work just fine in the old SM with SMSY, now with the LMDB everyone is supposed to start from scratch again?!!