My 1998 Genesis 1000 that I bought new came with that type of "quick connector." Was able to get it filled until about 2006 then they wouldn't fill those any more.
That’s basically what the previous owner said. Luckily, this new regulator was $9 off amazon, and I used a first-time-user promo code to “PropaneTaxi” to have the old tank exchanged for $7 total.
If anyone has Propane Taxi in their area, I couldn’t recommend more for the first time promo code. After your first use it seems to match the market in cost with delivery, but that first time is a great deal!