IN THE DARK!! Airbag plumbing questions

[gunkis84]

I bought an airbag setup last jan from kp components (2 art on the front and 2 slam sp. on the rear. 2 5 gal tanks 4 ports on each w/2 viar 400 compressors.. 8 valve manifold 2 kp guages and 4 switches) ... im just now getting to the point of installing (plumbing) (i have never done this before, nor seen it done. LOL i like figuring stuff out though haha) i have an 8 valve manifold on the ends of the manifold on each side it says "in" im guessing thats means in from the tanks (plug one side if you are running 1 compresser/tank) also on those ends it has an "E" im guessing it means exhaust.. now my question on this part.. do you run the exhaust (blow off) back into the tank? or can you?

that part out of the way.. on the long end there are 4 1/4 female ends.. im guessing these go to the bags?!? and the other long end there are 4 1/8" female.. do these go to the guages? (also they gave me 2 guages with 2 needles in each guage is one needle for front the other for rear (or however you plumb that to work?).. if im off at all plz let me know.. i just want to confirm my hunch before it "comit" to it.. also about the blow pressure going back into the tank.. is that ok? do i need a check valve to do that?

i know its a long question, but all the help i can get here is much appreciated

thanks
merle