Your terminology is puzzling. If you wish to make a permanent loop in a
cable pass the cable end through the ferrule, make your loop, and pass the
cable end through the other hole on the ferrule, Now crimp the ferrule with
a crimper or compress it with some hammer blows. It's a good idea to keep
the cable end slightly inside the ferrule hole so that stray wires don't
scratch. There is no need for a stop when making a loop. An eyelet is
sometimes a good idea with a cable loop.
To use a stop pass it through the cable end, run it up the cable to where
you wish to stop the cable, and crimp or hammer the stop.
Ok, now tell us what you are doing.