Agreed. One look at it and it's clear as Cindy Crawford's mole that the Barnett cable is
FAR superior to the sketchy OEM Enfield one. Having had one of those shabby Enfield OEM cables go
"Sproing!" on me, even though it was just about
the most convenient way it could happen, if you've got a Barnett in hand I'd recommend you waste no time in getting it on there. I'm not even sure I'd necessarily keep the old OEM cable as a spare...certainly not on the bike. Far quicker and more practical for temporary roadside repairs would to just toss a few of these
Solderless Screw-On Nipples into your tool pouch. They take up almost no room, and will have you on your way in minutes:
Of course, such doodads are only really meant to be a temporary expedient.
Fuller kits with replacement cables, shell housings, tips and so forth are also available here and there, but since 99.9% of broken cables are going to break right at the nipple, and then almost always at the harder-working hand lever end, you can think of these Screw-On Cable Ends as just a bit of cheap insurance no bigger than a thimbleful that'll just get you home, where you can sort it out properly at your leisure.
As for the actual cable replacement process, a handy step-by-step guide, at least for older iron cylinder engines with 5-speed gearboxes like my 2005 can be
found here. I imagine some of the simple tricks and techniques described there might be applicable to other models as well.