I can’t see the retaining pins that should be welded to the floor and protruding through the holes in the carpet in your photo Shayne, are they still there?
If not it’s a waste of time trying to buy the nuts, they’re plastic with a coin-sized slot in the top to spin them onto the “threaded” pins.
TBH it’s a waste of time getting them anyway, there’s almost no strength in them, I bought 4 for 2 quid, proving they’re not genuine, and the thread snapped out in them as soon as any pressure was put on them.
I’d go for some rivnuts in the floor and a skinny bolt with a mini penny washer.... must have a go at that myself one day...