That entire set up looks like a bunch of leaks just waiting to happen. I would just get 3 T fittings and one 90* that would screw into the bottom of each manifoldand connect them with rubber hose. basically the same as what is on a Gil system.
Either that or get straight fittings to screw in and use a CMI style distribution hose.
Not to mention, get rid of the copper pipe manifold to riser fitting.