We recently bought some Iscar JetCut OD turn holders to use on our Okuma LU400ex. We also got some braided hoses to plumb them up with, but I can't figure out where to screw them into the turret. I thought there'd be threads behind the brass ball coolant nozzle to use, but it doesn't look like that's the case. I called Gosiger and was told that there should be some threaded holes plugged with set screws for this on the turret. I thought I found them, but I removed a set screw, turned on coolant, and nothing came out, so now I'm at a loss. Does anyone know how this is supposed to be done?