Adding Rig/Slots Tab in S4S

Hello!  So, I am trying to make a "debug" planter useable in game.  I was successful in making it buyable, but it has no slots, and plants just drop right through it.  I am really new with objects, but from what I gather, it needs appropriate slots for other objects to sit on top of it.  I followed this tutorial: sims4studio.com/thread/3734/make-slotless-item-allow-placed and added the .binary file.  I have no tab in S4S called Rigs/Slots to go and try my hand at editing slots, and no idea how to add it besides cloning another object, but then replacing all the aspects in that seems like a lot of extra work.  Can anyone explain how I can add this tab?

Thanks!