Thanks Tom! The long loop would probably work, but my over-engineering cap was on that day
richs09, you're probably right about charging from the rails, but when I first started the instructions said to make sure all electronics was isolated from the frame. I tried to adhere to that but the motors are grounded to the frame via screws and such anyway, that I don't think it matters that much.
I mentioned "conductive" charging when I think I meant inductive.