It got here, installed it, seems to work fine, tested all ports, even simultaneously.
Keeping the packaging and everything in case I have to return it.
Also, it would appear my mousepad only draws about 180mA. I severely overestimated how much it would draw. Not sure if that SATA connector is even necessary, but I'll keep it.
Thanks for your help everyone. I'll look into the FEB Smart card you suggested if this one ends up giving me issues. And sorry for acting idiotic yesterday, I was sort of at my lowest.
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