Turbo Oil Return Line Location?

[Dieselmonkey89]

I have a 10 hp Yanmar Clone Diesel with a RHB31 turbo, I was wondering what the best way to run the turbo oil return line back into the crank case. Is there such thin as a barbed fitting that can screw into the large threads of one of the oil dip stick holes, or would it be best to remove the side of the crank case and drill and tap a return hole there?

[gearhead1951]

if you have two dipstick holes and they are both threaded , then you find the thread that fits and make a plug you can thread into the hole and drill & tap it for a barbed fitting for the oil return line !