Connecting battery charger to C32

It appears I've got the dreaded seat module battery drain, but it's going to be a little while before I can get it fixed. As an interim solution, I got a battery charger. What I'm wondering is whether I should connect it directly to the batter or to the little tab under the red door that you're supposed to use for jumping the car? Any Ideas?
On another subject, my humble little AMG got EuroSunday Bay Area car of the month. Check it out here: http://eurosunday.net/bay
Don
Congrats on the car of the month!




