I am in the process of installing a sloar system. I have two 2X20 sun Grabbers and two more on the way as well as a Goldline GLC-2P-A controller system. I have several questions. 1st I read where the panels need to be in parallel but the kit came with the connections to put each pair of 2x20 in series, so do i need to plumb them that way or should all 4 of the 2x20 be in parallel? Next i am attaching a picture of the manifold that I built when I had my SWG installed in anticipation of the solar insall, but before I decided on the controller,can you suggest what would be the best route to take? Also the panels are going to be running horizontally on the roof of my deck, so where do I place the vacuum breaker? If someone can draw something out I would greatly appreciate it. I have read on here so many differentthings that I am thoroughly confused. Thanks in Advance