Photosensor/spacing

[jault]

Hey guys i was just wondering does anyone know how far apart the photosensors are supposed to be? i saw a thread that said they mounted theirs, facing down, into a polycarbonate plate they made, but i didnt see anything about spacing, such as how far apart from each other they should be. any ideas or suggestions??

also, do you wire the blue wire to the negative terminal on the power distribution board and the brown to the red? and if so, where does the signal wire connect to ?

thanks,
1652