Basically you will want to look at the vanilla setup -- that's the best place to learn where to place them. But in short anywhere after/below the declared parent node where it hooked, that as I recall. As well the orientation and position must be spot on. I haven't fiddle with model-related stuff for months so I have forgotten lots of things likely.
Anyway, this will be the last time I reply to the question regarding the hooks as it'll be way off-topics from what this thread was meant to. It's to inform anyone about this useful tool I found and if anything merely any discussion about it. Granted, it leave holes where it could potentially expand further but I wish it didn't have to.
I suggest you to open a new thread -preferably on General Kotor/TSL Modding- about something like placing hooks to custom heads for example. I think that'd be great for you to find the appropriate answer and anyone in need of that specific presumably. Cheers!
Hi, and welcome! As well for you I suggest to open a new thread in particular for the topic -- something like editing NPC attributes or anything alike. Reason's pretty much the same -- this thread isn't the best place to discuss on that matter. But short answer to your question - you'll want to use KotOR SaveGame Editor or look for any available threads or discussions specific to finding/editing save files.
Best of luck to your attempt! 🍻