Part Number 14793-81 --- Demco eZ Latch A-Frame Coupler
eTrailer link ($152)https://www.etrailer.com/A-Frame-Trailer-Coupler/Demco/DM14793-81.html
Purchased from ($104)https://www.crofttrailer.com/14793-81-demco-ez-latch-a-frame-coupler-10-000-lb-capacity-2-black/
Factory coupler is a yoke type and can be difficult to unlatch. Demco eZ coupler is well, EZ to latch and unlatch.
Factory coupler has 4 vertical bolts going through each frame rail. Demco was designed to bold from the side through frame rails.
Demco would require drilling 6 holes in my Tab 320 frame rails, 3 on each side and would put the trailer jack too close to my boondock rack.
Nucamp designed the coupler to be installed with vertical bolts so that is what I did. That required drilling 4 holes in the top of the Demco coupler.