The KickStarter Kit I received from Acrobotic Industries had the solar panel binding posts already soldered to the board (thank you!)
Here’s the thing: how about putting polarity on the processing board - just print it on the board! A “+” and a “-” would be great!. OK, you have a 50/50 chance of getting it right. My luck was not so great so I had to make an extra trip up and down the ladder where I’ve mounted the panel.
For those trying to hook-up the panel: The solar panel has the + and - clearly identified (seen once you slide the cover off).
On the controller board, the positive connector is the one farthest from the sensor I/O connector. [This also means that it’s on the opposite side of the red, positive connector from the keyed battery-connector.]
At least that’s what worked for me… 'Hope this helps someone…!
BTW: If there’s a document or diagram that covers this - please let us all know! Thanks!