Heres where 1 hose connects on top of the opti, i didnt put it there, it was there and not connected. this one does NOT have the valves, and has nothing special on it, jsut a length of hose.
The second hose with the blue valves is currently connected to the bottom of the opti, again, i didnt put it there, and is not connected to anything on top. I put it on the intake manifold just for this pic to show where the split connector is. the opti hose i just throw on the top part of the splitter (marked with red X) but the bottom piece is the other unknown hose that i dont know where it goes. its bent 90 hard plastic then a length of hard plastic to a regular rubber vac line, but then i cant trace where that goes.
PS Yes the hose with the valves for sure should connect to the intake manifold according to the diagram, but should it connect at the other end to the top or bottom of the opti. thats the q now... that diagram doesnt show it because its stupid, and doesnt differentiate the hoses, but clearly has them merge in a plastic protector that is NOT SEE THROUGH. **** you very much engineering genius@gm.