I have just taken a peek at my Classic 350s battery compartment and in aeronautical terms it's a negative, and i fitted one to the Interceptor myself, and that's a positive. Question is, and I know you're going to think I'm extremely wealthy, but i have three battery tenders and the connection are all slightly different, the basic design of the connection is similar but not universal. So were you supplied with a flying lead that you could splice to whatever you were going to connect to. Just asking.