I'm pretty sure all ATV winches use the loop and ball to secure the cable to the drum. My Warn winches also say to never allow the line to unrwap all the way. That's basic winching 101. If you think you'll need all of your cable, take an extension in your rear cargo box and use that.
Not sure what model you installed your winch on, but I didn't have any trouble mounting on any of my rigs.
I have two Viper Max winches and they have been problem free for 5+ years of abuse and hard use. The Viper Classic I bought croaked about a month after the warranty ran out, so not a Viper fan boy by any means. The Viper Classic was a pos, but the Max have been great winches.
Warn is the King of the hilll in the winch world, and probably always will be. I've been running Warns on my Jeeps since the mid 90's, and they are great winches, but you can't convice me that a Warn ATV winch is worth what they want for them. The Viper Max's I bought and and Superwinch LT3000 I bought for $123 shipped on Amazon have been problem free, and cost a fraction of what a Warn would have cost. Problem free is problem free, so the only variable is cost, and Warn ATV winches cost too much.