My 1404 has a disc right at the front of the driveshaft it is located on the trans output.
It loves to hold really tight. when the imp is on the roll back I can back up. slip it on and it holds that machine Right there.
Without it loading on the truck would require a pull with the cable.
I am a huge fan of functioning ebrakes.
As a flat lander:
I have had a few loading concerns from being too cold, intoxicated, tired, lazy, distracted, bored, frustrated, hurried, excited, clumsy, (you get the idea) to press on with out one.
at a minimum I will give up on the cable operated stuff and install a Hydraulic lock in line.
I can get a photo of mine if you desire. (not really wanting pull my floor out) but I will if you need the details a photo can provide.