Attaching Blackstone grill to RV LP accessory connector

Take the black pipe out of your Blackstone and unscrew the fitting that connects to its regulator...may need to put it in a vise...that thing is tight. That fitting's threads match that of a 3/8" compression fitting. I bought a 3/8" male to 1/4" npt male adaptor (sku 645791). Screw that on the black pipe and reinstall it (use gas tape). Now screw a 1/4" union (sku 645697) and (I already had) the 1/4" quick connector that fits into the other end of the union on the end. Works great.