No worries, it just piqued my interest so I had to blow it up to check
. Now that we know there are both + and - connections, I'll let those who are versed in this stuff comment, as the only solar I have is a small unit plugged into the cigarette lighter to keep the chassis battery from draining (found that was a good idea after trying to open her up but didn't have enough power for the key fob to work).