I just dealt with the same thing. I didn't see what year your 'tour was, but mine's a '98. I saw some corrosion on the positive post clamp, which had been hidden by the plastic cover. I started moving things around to clean it, and the cable came off loose in my hand! The attaching plate with wires was OK, so I was able to get a (heavy lead) terminal only and put it on. It fit with some shoving.
I think the battery post must leak a little acid. I put new felt washers on, and some grease. I'll be watching it- I'm leaving the plastic cover off!
Good luck!
