has anyone any info on the old ISOFOTON PANELS .I HAVE TWO , EACH HAS TWO JUNCTION BOXES ON THE REAR ONE NEAR THE TOP AND THE SECOND NEAR THE BOTOM , INSIDE EVERY BOX THERE IS 3 CONECTIONS THE OUTER OF THE TWO CONECTIONS IS JOINED WITH WHAT LOOKS LIKE A DIOED .HOW DO I WIRE THEM AS 24 VOLT .