2 Sets Universal Magnetic Extension Cable JR ZH1.5 Wire Connector for RC Models Car Planes Drones (JR Wire)

I've always wanted to be able to magnetically connect my bikes/truck to the tender but haven't found a clean solution. I just ordered some of these (https://www.amazon.com/BRKRC-Universal-Magnetic-Extension-Connector/dp/B0FDG681GZ) to see if they will work. I'm thinking ground on the outer pins and + on the middle. I don't think my battery tenders will push too much current but time will tell. It won't be as nice as yours but seeing what you've done is getting me off my butt.