why wouldn't the seat belt holder work? Is there an adapter that's needed or something?
The oem seat has a bracket that attaches to the seat, the seat belt slides in to that. However, it frequently slips out, probably 30-50% of the time I went to buckle up, I'd have to fish it back through the holder.
With the seat now, I take like one extra second when I get out of the car and drape the belt over the bolster. It sits like factory and doesn't slip, even when getting in to the car. I have come to accept that while it's not a perfect solution, it's no worse than stock.