I just installed a battery maintainer pigtail so I had the battery cables off. ( BTW what's up with the little nuts that drop down - used a long wooden match stick to raise them up enough to re-engage the thread.) Fortunately I did the 12 minute tune after I installed the pigtail - sheer luck!
Now I know - thanks for the heads up.
Is that "pigtail" the cables you attach to the battery so you can hook up the battery maintainer by just plugging it into a type of socket?