I'm curious, why do you disconnect the battery terminal leads while charging or have a maintainer hooked up? I have a CTEK charger/maintainer and it direct's you to just hook up and charge. I have preferred to install the leads that have the eyelets on the battery leads that I have since they fit the small post's on both positive and negative battery lead's. Then when I want to charge or maintain all I have to do is plug in the lead from the CTEK unit to the wired in line's that CTEK furnished. Hope you understand what I'm saying. If you have a CTEK charger/maintainer your familiar with their leads. But again, why would you want to remove the battery cable's when you charge? To my knowledge, all that is necessary is + to + and - to -, plug in the charger and away you go. That way there's no risk of losing any memory caused by a disconnected battery.

Jim