Working on cooling system for twin Volvo Penta AQAD 40B engines missing 1 fitting, R.H. is 4.25" long, x 1.25" O.D. x 1.5" O.D.tried to order part # 845443 (coolant pipe) but wrong part came L.H., also tried # 838559, anyway can't seem to find a good break-down parts manual, other picture is of sea water pump (center) fitting goes in bottom, other thing having trouble with the routing of coolant hoses, any help would be appreciated, I'm not an Marine Mechanic, I am a Heavy Equipment Technician, so a lot of this is new to me.