Actually Jeff... there is ANOTHER way to attach a battery maintainer (but it has to have spring clamp connectors). I prefer going under the hood for my charging purposes... I open the red plastic cover on the passenger side (and leave it unsnapped), to expose the hot terminal connection... connect the positive (red) clamp there, then the negative (black) clamp to a ground (I use a mounting bolt for the alternator). Others may not like, but it works great for me... also, seeing the hood popped up is a good reminder to me that I have a charger attached (I've driven off in the past... more than once! 😬 ).