Have a look on Amazon. They have a bunch of pictures of the replacement valve and a 360⁰ view you can Pivot around.
YouTube has a lot of videos.
Hope this helps.
Valterra-TC372 Flexible Cable Kit with 3" Valve, Mess-Free Waste Valve for RV's, Campers, Trailers, Black
https://a.co/d/5hAC898