T-Spec Pos/Neg 4-Gauge Battery Terminal
Crutchfield Customer Review (What's this?)
I bought the optimum dual post battery and use this on the negative post for accessories works great, looks good. did have to do a little prying to get on the negative post. Not sure if it's just the size of the top post of the optimum battery. but will not fit the positive top post. Gave it a 3 ratings because I actually bought it for the positive post. If you have the smaller battery post it should work fine.