I remember my original 3DS having a blank insert in the slot 1. I can't find it since at the time I had a DSTWO filling the slot and I just tossed it into a random junk box. I recently got a New3DS. I can put the DSTWO into the empty slot, but I'm worried that it might be draining the power when not in use. If not then I don't need a plug. Otherwise, what is the name of the plug and is it sold anywhere?