https://drive.google.com/file/d/0B2X-bj_TJfWQZk81Y3h1Ukk1WHc/edit?usp=sharing

can anyone tell me what I could use to connect 8 Gridseeds to 1 connection of the powersupply
it's the questionmark on the diagram

does it matter that the load is not spread completely even? 9 gridseeds / 9 gridseeds / 8 gridseeds ?

Also: if any stupidity is found in that diagram, please let me know  

thanks