i know its a new battery, but i'd replace it and write it off as experience. Now we know that you should use the bolts that the battery comes with. got a lawn mower or an electric winch you can use it for maybe then fine, but I wouldn't run that in my ski, its just asking for a problem.
I'd try to return/exchange it if you can, but it looks like user error to me, just depends on how fault proof the warranty is I guess.
I've made many more expensive mistakes than that so this isn't any spilled milk to me.
I routinely ride 30 miles each way on an outing so no way am I getting creative with the battery, i'm heading to the store.